Atoms, Elements & Compounds TEST REVIEW

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

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

Front

How many protons are in a fluorine atom?

Back

Fluorine has 9 protons.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

How many electrons does an oxygen atom have?

Back

Oxygen has 8 electrons.

Front

What is the atomic mass of oxygen?

Back

The atomic mass of oxygen is approximately 16.

Front

How many elements are in the compound Na2CO3?

Back

There are 3 elements in Na2CO3: Sodium (Na), Carbon (C), and Oxygen (O).