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Preview: About.com Chemistry: Most Popular Articles

About.com Chemistry: Most Popular Articles



These articles are the most popular over the last month.



Published: Wed, 28 Sep 2016 11:16:08 +0000

 



Is Red Bull Made from Bull Semen?

2016-09-28T11:16:08Z

Find out whether the taurine in Red Bull came from bull semen.



3 Ways To Calculate Atomic Mass

2016-09-28T11:16:08Z

The atomic mass or atomic weight of an element is a weighted average of the isotopes. Here are 3 simple ways to calculate atomic mass of an element.



10 Facts About Acids and Bases

2016-09-28T11:16:08Z

Here are 10 facts about acids and bases to help you learn about acids, bases, and pH and complete your homework.



10 Examples of Chemical Changes That We...

2016-09-28T11:16:08Z

Chemical changes occur when chemical reactions between substances form new products. Get examples of 10 chemical changes in everyday life.



10 Examples of Physical Changes

2016-09-28T11:16:08Z

Physical changes involve a new form or shape of matter, but no chemical reaction. This is a list of 10 examples of physical changes.



How to Calculate the Concentration of a...

2016-09-28T11:16:08Z

Calculating concentration is a basic skill needed by chemistry students. This is a list of steps and examples to calculate the concentration of chemical solutions in percent composition by mass, volume percent, molarity, molality, and normality.



Heterogeneous and Homogeneous Mixtures: What's...

2016-09-28T11:16:08Z

Heterogeneous and homogeneous refer to mixtures of materials in chemistry. Learn about the difference between these mixtures and get examples of each type.



Understand the Difference Between Independent...

2016-09-28T11:16:08Z

The difference between independent and dependent variables in a scientific experiment is which variable is being measured. Here's an explanation of how to tell these critical variables apart.



10 Examples of Mixtures

2016-09-28T11:16:08Z

This is a list of 10 examples of mixtures and an explanation of whether the mixture is heterogeneous or homogeneous.



10 Examples of Chemical Reactions in Everyday...

2016-09-28T11:16:08Z

Chemistry happens in the real world, not just a lab. Here are 10 examples of chemical reactions in everyday life.



Know the Difference Between Baking Powder &...

2016-09-28T11:16:08Z

Baking powder and baking soda both make baked goods rise. Learn the difference between baking powder and baking soda and how to make ingredient substitutions.



Learn What Chemical Properties Are and Get...

2016-09-28T11:16:08Z

Here is an explanation of what chemical properties are, plus several examples of chemical properties of matter.



What's the Difference Between Chemical and...

2016-09-28T11:16:08Z

Here are some examples of physical changes and chemical changes, along with an explanation of how you can tell physical and chemical changes apart.



Teach Yourself Chemistry

2016-09-28T11:16:08Z

You can teach yourself general chemistry with this step-by-step introduction to the basic concepts.



Is Vitamin C an Organic Compound?

2016-09-28T11:16:08Z

Learn whether ascorbic acid or vitamin C is an organic compound or an inorganic compound and how you can tell.



Easy Ways To Substitute Baking Powder and...

2016-09-28T11:16:08Z

Baking powder and baking soda are leavening agents that help baked goods to rise. Here is exactly how to substitute baking powder and baking soda.



Simple Explanation of the Scientific Method Steps

2016-09-28T11:16:08Z

This is a list of the 6 steps of the scientific method, with explanations of each step of the process.



10 Types of Solids, Liquids, and Gases

2016-09-28T11:16:08Z

Get examples of types of solids, liquids, and gases and learn about the transitions or phase changes between them.



Independent Variable Definition and Examples

2016-09-28T11:16:08Z

This is the definition of an independent variable, with examples. An independent variable is one of the key factors in a scientific experiment.



Know the Differences Between DNA and RNA

2016-09-28T11:16:08Z

DNA and RNA both carry genetic information, but there are differences between them. This is a comparison of the differences between DNA versus RNA.



Examples of Independent and Dependent Variables

2016-09-28T11:16:08Z

Get the definitions for independent and dependent variables, examples of each variable, and the explanation for how to graph them.



What Are the Types of Chemical Reactions?

2016-09-28T11:16:08Z

When you mix chemicals, you may get a chemical reaction. Learn about the different types of chemical reactions and get examples of the reaction types.



Understand How pH and pKa Are Related

2016-09-28T11:16:08Z

pH and pKa are ways to express strength of acids. Here's the relationship between the two values and how to use the Henderson-Hasselbalch equation.



This Is How To Calculate Percent Error

2016-09-28T11:16:08Z

Percent error or percentage error is the difference between an approximate or measured value and an exact or known value. Here is how to calculate percent error.



Learn the Properties and Characteristic of...

2016-09-28T11:16:08Z

These are properties of covalent compounds, also known as molecular compounds.



What Is an Isotope? Definition and Examples

2016-09-28T11:16:08Z

Isotopes are one form an element can take. This is the definition of an isotope, with examples.



Know the Major Laws of Chemistry

2016-09-28T11:16:08Z

Here's a reference pages that describes the major laws of chemistry.



How Formulas of Ionic Compounds Work

2016-09-28T11:16:08Z

Learn how formulas of ionic compounds work and see examples of compounds, their cations, and their anions.



Is It Okay To Drink Distilled Water?

2016-09-28T11:16:08Z

Distillation is one method of water purification. Is distilled water safe to drink or as good for you as other types of water? The answer depends on a few different factors.



Why You Shouldn't Mix Bleach and Ammonia

2016-09-28T11:16:08Z

Mixing bleach and ammonia is extremely dangerous, since toxic vapors will be produced. Here are the chemical reactions involved and first aid advice.



How to Write a Lab Report

2016-09-28T11:16:08Z

Lab reports are an essential part of all laboratory courses and a significant part of your grade. Here's a format for a lab report you can use if you aren't sure what to write or need an explanation of what to include in the different parts of the report.



Examples of Chemical Weathering

2016-09-28T11:16:08Z

Here are 5 common examples of chemical weathering, a collection of processes that change rocks via chemical reactions.



What Borax Is and Where You Can You Get It

2016-09-28T11:16:08Z

Borax is a common household and commercial chemical. Here's a look at what borax is, some facts about borax and how you can get borax.



How to Name Molecular or Covalent Compounds

2016-09-28T11:16:08Z

Here is the nomenclature or naming rules for molecular compounds, plus examples of how to name the compounds.



Elements by the Numbers From Hydrogen to...

2016-09-28T11:16:08Z

Here's a list of all of the chemical elements of the periodic table ordered by increasing atomic number. The names and element symbols are provided.



Understand the Difference Between a Cation and...

2016-09-28T11:16:08Z

Cations and anions are both ions. The difference between a cation and an anion is the net electrical charge of the ion. Here is how to tell them apart.



Understand the Difference Between Organic and...

2016-09-28T11:16:08Z

Organic and inorganic compounds are the basis of chemistry. Here is the difference between organic and inorganic, plus examples of each type.



What Are the Different Element Groups in the...

2016-09-28T11:16:08Z

These are the element groups found in the periodic table of the elements. There are links to lists of elements within each group.



An Easy Way to Calculate Molarity of a Solution

2016-09-28T11:16:08Z

Molarity is a unit of concentration measuring the number of moles of a solute per liter of solution. Here is how to calculate molarity of a solution.



4 Types of Inorganic Chemical Reactions

2016-09-28T11:16:08Z

Learn how to classify inorganic chemical reactions into one of these four general categories.



Know the Difference Between Physical and...

2016-09-28T11:16:08Z

Learn how to distinguish between a chemical property and a physical property of matter. Here's the explanation of the distinction, with examples.



Control vs. Experimental Group: How Do They...

2016-09-28T11:16:08Z

Learn about the difference between the control group and the experimental group in a scientific experiment, including positive and negative controls.



What Is a Pure Substance? Definition and Examples

2016-09-28T11:16:08Z

This is the definition of pure substance along with examples of things that are pure substances (and ones that aren't).



How Much of The Human Body Is Water?

2016-09-28T11:16:08Z

Have you ever wondered how much of your body is water? The percentage of water varies according to your age and gender. Here's a look at how much water is inside you.



Chemical Formulas Practice Test Questions

2016-09-28T11:16:08Z

Here are ten multiple choice questions covering chemical formulas. Topics include simplest and molecular formulas, mass percent and naming compounds.



What Is a Pure Substance?

2016-09-28T11:16:08Z

A pure substance or chemical substance is a material that is homogeneous and has constant properties throughout the sample. Here are examples of pure substances.



Ways To Make an Atom Model

2016-09-28T11:16:08Z

Atoms are the smallest units of each element and the building blocks of matter. Here's how to make an atom model using common materials.



Can You Name the 7 Diatomic Elements?

2016-09-28T11:16:08Z

There are seven elements that form homonuclear diatomic molecules or simple molecules with their own atoms. This is a list of the 7 diatomic elements.



Scientific Experiments: What Is a Control Group?

2016-09-28T11:16:08Z

A scientific experiment may be designed with a control group. Here's what a control group is and how it helps increase the validity of an experiment.



Why You Shouldn't Mix Bleach and Vinegar

2016-09-28T11:16:08Z

Mixing bleach and vinegar is a bad idea because it produces toxic chlorine gas. Here's what you should know about mixing these chemicals.



Quick Chemistry Facts About the Ideal Gas...

2016-09-28T11:16:08Z

The gas constant or R is an important constant in the ideal gas law. This is the definition and value of the gas constant.



Common Examples of Covalent Compounds

2016-09-28T11:16:08Z

These are examples of covalent bonds and covalent compounds and an explanation of the type of atoms expected to form this type of chemical bond.



Practice Chemistry with Worked Chemistry Problems

2016-09-28T11:16:08Z

This is an alphabetical list of worked example chemistry problems. Printable worksheets with questions and answers are also provided.



Melt Ice for Science in this fun Experiment

2016-09-28T11:16:08Z

In the melting ice experiment, make a colorful ice sculpture while learning about freezing point depression and erosion.



Understand the Difference Between Accuracy and...

2016-09-28T11:16:08Z

This is an explanation of the difference between accuracy and precision. Examples of accuracy and precision are also provided.



How to Calculate Mass Percent in Chemistry

2016-09-28T11:16:08Z

Mass percent composition of a molecule shows the amount each element in a molecule contributes to the total molecular mass. This step by step tutorial will show the method to determine the mass percent composition of a molecule.



What Are the Steps of the Scientific Method?

2016-09-28T11:16:08Z

The scientific method is a method for conducting an objective investigation. The scientific method involves making observations and conducting an experiment to test a hypothesis. Here are the steps of the scientific method.



What Is an Experiment?

2016-09-28T11:16:08Z

You know science is concerned with experiments and experimentation, but do you know what exactly an experiment is? Here's the answer to the question.



Which Elements Are Radioactive?

2016-09-28T11:16:08Z

This is a list or table of elements that are radioactive. This list has the element name, most stable isotope and half-life of most stable isotope.



Why Atoms Form Chemical Bonds

2016-09-28T11:16:08Z

Have you ever wondered why atoms form chemical bonds with other atoms? Here's the scientific reason and an explanation of stability.



Learn the Parts of the Periodic Table

2016-09-28T11:16:08Z

Learn about the parts of the periodic table and how to use the table organization to predict element properties.



Big Collection of Printable PDF Periodic Tables

2016-09-28T11:16:08Z

Download or print these PNG and PDF printable periodic tables to help work chemistry problems or to predict properties of the elements.



Equation for the Baking Soda and Vinegar Reaction

2016-09-28T11:16:08Z

The reaction between baking soda and vinegar is used in chemical volcanoes. Here is the equation for the reaction between baking soda and vinegar.



Handy List of All the Element Symbols

2016-09-28T11:16:08Z

The elements are the basis for all matter. Learn the one and two letter symbols for the chemical elements of the periodic table using this handy list.



What Is a Controlled Experiment? - Definition...

2016-09-28T11:16:08Z

One of the most common types of experiment is a controlled experiment. Here is a look at what a controlled experiment is and why this type of experiment is so popular.



Learn How To Determine Significant Figures

2016-09-28T11:16:08Z

Learn what significant figures are and how they are used with respect to scientific measurements and calculations.



Examples of Compounds with Ionic Bonds

2016-09-28T11:16:08Z

Ionic compounds form when elements share electrons. Here are examples of ionic bonds and ionic compounds.



What Makes Water a Polar Molecule?

2016-09-28T11:16:08Z

Water is a polar molecule. Here is the explanation for why water is a polar molecule and why water is a polar solvent.



Learn About Lewis Structures or Electron Dot...

2016-09-28T11:16:08Z

Learn about Lewis structures, also called electron dot structures and get step-by-step help drawing them.



What Molecular and Empirical Formula Are and...

2016-09-28T11:16:08Z

Here is a look at what the molecular formula and empirical formula are and steps for finding the molecular formula and empirical formula.



Review the Bohr Model of the Atom

2016-09-28T11:16:08Z

Learn about the Bohr Model of the atom, which has an atom with a positively-charged nucleus orbited by negatively-charged electrons.



How to Calculate Theoretical Yield

2016-09-28T11:16:08Z

Here's how to calculate theoretical yield or how much product will be produced with given quantities of reactants.



What's the Difference Between Ionic and...

2016-09-28T11:16:08Z

Ionic and covalent bonds hold molecules together. Learn to distinguish between ionic and covalent bonds, and determine whether a bond will be polar or nonpolar.



Understand the Difference Between Mass and Weight

2016-09-28T11:16:08Z

Here is a simple explanation of the difference between mass and weight, with examples and a chart comparing the two concepts.



Essential Element Facts

2016-09-28T11:16:08Z

The chemical elements are the building blocks of all matter. Here are interesting and essential element facts you need to know.



Ideal Gas Law Test Questions

2016-09-28T11:16:08Z

The ideal gas law is an important concept in chemistry. This is a collection of ten chemistry test questions and answers relating to ideal gas laws.



Free PDF Chemistry Worksheets To Download or...

2016-09-28T11:16:08Z

Looking for free PDF chemistry worksheets that you can print? The answers to the questions are available on separate pages so you can fill them out and then check your work.



10 Interesting Periodic Table Facts

2016-09-28T11:16:08Z

The periodic table organizes the elements according to their periodic properties. Find 10 periodic table facts that are interesting and informative.



10 Examples of Elements and Their Symbols

2016-09-28T11:16:08Z

Chemical elements are known by their names and by their symbols. Here is a list of 10 examples of elements and their symbols.



Is It Safe To Drink Bleach? Will It Kill You?

2016-09-28T11:16:08Z

Learn whether or not it is safe to drink bleach, what happens if you do, and whether it can kill you. Also answering the rumor if drinking bleach can help you pass a drug test



What Temperature Does Water Boil?

2016-09-28T11:16:08Z

At what temperature does water boil? What determines the boiling point of water? Here's the answer to this common question.



What Is a Dependent Variable?

2016-09-28T11:16:08Z

This is the definition of a dependent variable as the phrase is used in a scientific experiment. Get examples of dependent and independent variables.



How To Balance Ionic Equations

2016-09-28T11:16:08Z

These are the steps to write a balanced net ionic equation. You'll learn how to balance any equation for mass and charge, plus there are examples.



What Does pH Stand For?

2016-09-28T11:16:08Z

Have you ever wondered what pH stands for or where the term originated? Here is the answer to the question and a look at the history of the pH scale.



How To Make Sulfuric Acid at Home

2016-09-28T11:16:08Z

Sulfuric acid is a useful acid to have on hand for a variety of home chemistry projects. However, it is not easy to obtain. Fortunately, you can make it yourself.



Is Dissolving Salt in Water a Chemical Change...

2016-09-28T11:16:08Z

Is dissolving salt in water a chemical change or a physical change? Here's the process that occurs and an explanation of the answer.



Working on a Science Project? Start With the...

2016-09-28T11:16:08Z

Science fair and research projects apply the scientific method. Here's an explanation of the scientific method and how the scientific method is used.



Understand How Distillation Works

2016-09-28T11:16:08Z

Here is an explanation of the process of distillation, a common method used in chemistry to separate substances.



Here Are 10 Things That Are Not Made of Matter

2016-09-28T11:16:08Z

Everything that has mass and takes up space is matter, yet some things do not consist of matter. Here is a list of 10 examples of non-matter.



10 Examples of Everyday Chemistry in the World...

2016-09-28T11:16:08Z

Chemistry is a big part of your everyday life. You find chemistry in daily life in foods you eat, air you breathe, soap, your emotions and literally every object you can see or touch. Here's a look at some examples of everyday chemistry.



Printable Periodic Tables (PDF)

2016-09-28T11:16:08Z

Sometimes it's nice to have a paper version of the periodic table of the elements that you can refer to when working problems or doing experiments in the lab. This is a collection of periodic tables that you can print and use.



What Stoichiometry Is and Why You Need To...

2016-09-28T11:16:08Z

Here's an explanation of what stoichiometry is, the types of problems it covers, and why it is important to understand it.



10 Useful RNA Facts

2016-09-28T11:16:08Z

RNA or ribonucleic acid is used to translate instructions from DNA to make proteins in your body. Here are 10 interesting and fun facts about RNA.



Fun and Interesting Chemistry Facts

2016-09-28T11:16:08Z

Chemistry is a fascinating science, full of unusual trivia! Here are some fun and interesting chemistry facts for you.



Get Printable Worksheets To Practice Balancing...

2016-09-28T11:16:08Z

This is a collection of printable worksheets to practice balancing equations. The printable worksheets are provided in pdf format with separate answer keys.



What Is the Density of Water?

2016-09-28T11:16:08Z

The density of water is its weight per unit volume, which depends on temperature. Density is about 1 gram per milliliter, but here are more precise values for you.



What Are the First 20 Elements?

2016-09-28T11:16:08Z

Here are the first 20 elements of the periodic table, their atomic numbers, and the element symbols.



What the Numbers on the Periodic Table Mean

2016-09-28T11:16:08Z

Are you confused by all the numbers on a periodic table? Here's a look at what they mean and where to find important numbers on the table.



What Is the Importance of Chemistry?

2016-09-28T11:16:08Z

What is the importance of chemistry? Why would you want to learn about chemistry? Chemistry is the study of matter and its interactions with other matter and energy. Here's a look at the importance of chemistry and why you should study it.



How Quantum Numbers and Electron Orbitals Work

2016-09-28T11:16:08Z

The properties of an atom's electron configuration are described by four quantum numbers: n, l, m, and s. Here's what the quantum numbers mean.