Periodic Table Basics Review

Front

How many valence electrons does Helium have?

Back

2

Front

Where are most metals on the periodic table?

Back

on the left side and in the middle

Front

Bromine (atomic #35) is in Period ___________.

Back

4

Front

The _________ tells us how many valence electrons an element has.

Back

Group

Front

What is the atomic mass of Bromine?

Back

58.693

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is a period in the periodic table?

Back

A horizontal row of elements.

Front

What is a group in the periodic table?

Back

A vertical column of elements.

Front

What do elements in the same group have in common?

Back

They have the same number of valence electrons.

Front

What is the significance of the atomic mass?

Back

It represents the average mass of an element's isotopes.