UP and DOWN columns on the periodic table are

• groups

• periods

SIDE TO SIDE rows on the periodic table are

• groups

• periods

The group number tells you the number of

• protons

• valence electrons

• energy levels

The period number tells you the number of

• protons

• energy levels

• valence electrons

How many protons does Lithium have?

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

These elements are in a:

• group

• period

Do these elements have properties in common?

• yes

• no

Tags

NGSS.MS-PS1-2

These elements are in a:

• group

• period

Which elements are stable?

• Group 1

• Group 8

• Group 18

Which elements have 1 valence electron?

• period 1

• group 1

• group 4