Valence Electrons

For most elements, the number of valence electrons can be determined from the _______________

• atomic number

• period number

• group number

An element in Group number 14 has ______________ many electrons.

• 0

• 4

• 14

An element in Group 1 has ___________ valence electrons.

• 0

• 1

• 8

An element in Group 17 has _____________ valence electrons.

• 7

• 8

• 17

How many valence electrons does calcium (Ca) have?

• 2

• 8

• 20

How many valence electrons does carbon (C) have?

• 0

• 4

• 14

How many valence electrons does sulfur (S) have?

• 0

• 6

• 16

How many valence electrons does aluminum (Al) have?

• 8

• 13

• 3

How many valence electrons does hydrogen (H) have?

• 1

• 8

• 0

How many valence electrons does oxygen (O) have?

• 6

• 8

• 16