Compounds & Counting Atoms Review

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

How many total atoms are in the compound H₂SO₄?

Back

7

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

Why is carbon dioxide considered a compound?

Back

Because carbon dioxide is made of two different elements: carbon and oxygen.

Front

Which of the following is not a compound: HCl, Cl, NaCl, CO₂?

Back

Cl is not a compound; it is an element.

Front

What is the chemical formula for water?

Back

H₂O, which consists of 2 hydrogen atoms and 1 oxygen atom.

Front

What is the difference between an element and a compound?

Back

An element is a single type of atom, while a compound consists of two or more different types of atoms bonded together.

Front

What does the subscript in a chemical formula indicate?

Back

The subscript indicates the number of atoms of the element in the compound.

Front

What is the chemical formula for table salt?

Back

NaCl, which consists of sodium and chlorine.

Front

How many atoms are in the compound C₆H₁₂O₆ (glucose)?

Back

24 total atoms (6 carbon, 12 hydrogen, 6 oxygen).