Periodic Table Review

What is the elemental symbol of this element?

• 5

• 10

• B

• 10.811

The periodic table is arranged by increasing ______ ______, which is equal to the number of protons.

• atomic mass

• atomic number

The group number tells you the number of _______ ________.

• valence electrons

• energy levels

The period number tells you the number of ______ _______.

• valence electrons

• electron shells

Elements in the same family have similar _______________.

• Protons

• Physical and Chemical Properties

• Shape

• Size

Families or Groups are the vertical columns on the periodic table. How many Families/Groups are there?

• 18

• 7

• 12

• 20

Periods are the rows of the periodic table. How many are there?

• 7 

• 18

• 12

• 20

Neutrons = ________minus _______

• Atomic mass - atomic number

• Atomic number - atomic number

• Atomic number - Group number

• Atomic number - Period number

The atomic number can tell us

• How many protons the atom has

• How many electrons the atom has

• How many neutrons the atom has

• How mant protons and electrons an atom has

What is the atomic number of Boron?

• 10

• 5

• 10.811

• 7