Groups and Periods

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

UP and DOWN columns on the periodic table are

• groups

• periods

SIDE TO SIDE rows on the periodic table are

• groups

• periods

Which elements have properties in common?

• elements in a group

• elements in a period

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

Elements in the same __ have the same number of valence electrons

• group

• period

• row

• chart

Which elements have 1 valence electron?

• period 1

• group 1

• group 4

which elements have 4 valence electrons?

• group 3

• group 4

• group 14

Elements in the same __ have the same number of energy levels.

• group

• period

• row

• chart