Atoms, Elements & Compounds TEST REVIEW

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the atomic number of oxygen?

Back

8

Front

How many protons does oxygen have?

Back

8

Front

What is a compound?

Back

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

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms.

Front

What type of charge does a proton have?

Back

Positive

Front

What type of charge does a neutron have?

Back

Neutral

Front

What type of charge does an electron have?

Back

Negative

Front

How many elements are represented in the compound Na2CO3?

Back

3 (Sodium, Carbon, and Oxygen)

Front

What is the chemical formula for carbon dioxide?

Back

CO2