Compounds & Counting Atoms Review

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together in a fixed ratio.

Front

What is an element?

Back

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

Front

How many atoms are in the compound H2O?

Back

There are 3 total atoms in H2O (2 hydrogen atoms and 1 oxygen atom).

Front

What does a chemical symbol represent?

Back

A chemical symbol is a one or two-letter notation used to represent an element, not a compound.

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

How many total atoms are in the compound C2H8O?

Back

There are 11 total atoms in C2H8O (2 carbon, 8 hydrogen, and 1 oxygen).

Front

What is the chemical formula for sulfuric acid?

Back

The chemical formula for sulfuric acid is H2SO4.

Front

Is NaCl an element or a compound?

Back

NaCl is a compound, specifically sodium chloride.

Front

What does the subscript in a chemical formula indicate?

Back

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

Front

What is the chemical symbol for sodium?

Back

The chemical symbol for sodium is Na.