Unit 2: Atoms and the Periodic Table

Front

What is the atomic number?

Back

A unique number for each element that equals the number of protons in an atom of that element.

Front

What elements are located to the LEFT of the zigzag line on the periodic table?

Back

Metals.

Front

How many valence electrons does a carbon atom have?

Back

4.

Front

What are the positive particles of an atom called?

Back

Protons.

Front

What is the central region of an atom where its neutrons and protons are located?

Back

Nucleus.

Front

What is the charge of an electron?

Back

Negative.

Front

What is the charge of a proton?

Back

Positive.

Front

What is the charge of a neutron?

Back

Neutral.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number and properties.