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Chemistry Quiz: Elements and Compounds Formulas

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Chemistry Quiz: Elements and Compounds Formulas

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Questions and Answers

What is a compound?

A substance made up of different kinds of atoms bonded together.

What is an element?

A substance made up of atoms of the same kind.

What is the chemical name for everyday salt?

Sodium chloride.

How are compounds identified through formulae?

By the symbols of the elements that are bonded together in the compound. Signup and view all the answers

What is the formula for carbon monoxide?

CO. Signup and view all the answers

How many oxygen atoms are bonded to one carbon atom in carbon dioxide?

Two. Signup and view all the answers

Explain the difference between an element and a compound using examples from the text.

Elements are substances made of only one type of atom, while compounds are made of two or more different elements chemically bonded together. For example, Na and Cl are elements, while NaCl is a compound. Signup and view all the answers

How many different elements are in sulfur dioxide? How many oxygen atoms are combined with each sulfur atom?

There are two different elements in sulfur dioxide (sulfur and oxygen). Each sulfur atom is combined with two atoms of oxygen. Signup and view all the answers

What two elements make up water? What does the formula H₂O indicate about their combination?

Hydrogen and oxygen make up water. The formula H₂O shows that two hydrogen atoms are combined with one oxygen atom. Signup and view all the answers

Why is the compound CO named carbon monoxide instead of carbon oxide?

CO is named carbon monoxide to indicate that each molecule contains one atom of carbon and one atom of oxygen, forming a specific compound. Signup and view all the answers

Provide the names of the compounds with the following formulas: a) MgO, b) NaCl, c) CaCl.

a) Magnesium oxide, b) Sodium chloride, c) Calcium chloride Signup and view all the answers

Why do bottles of chemicals usually display both the chemical name and formula on the label?

Bottles of chemicals display both the chemical name and formula to provide clarity and ensure accurate identification of the substance. Signup and view all the answers