Periodic Table Basics

Front

What are the vertical columns in the periodic table called?

Back

Groups.

Front

In which direction are groups arranged in the periodic table?

Back

Up and down.

Front

What is the number at the bottom of each square on the periodic table?

Back

Atomic mass.

Front

How many electrons can the first energy shell hold?

Back

2.

Front

What are the major groups in the periodic table?

Back

Group 1: Alkali metals, Group 2: Alkaline earth metals, Group 17: Halogens, Group 18: Noble gases.

Front

What do elements in the same group have in common?

Back

They have similar properties and the same number of valence electrons.

Front

What is the term for the horizontal rows in the periodic table?

Back

Periods.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What are metalloids?

Back

Elements that have properties of both metals and nonmetals.

Front

What is a chemical symbol?

Back

A one or two-letter abbreviation for an element.