Electron Configuration & Trends in PT

What is the electron configuration of helium?

• 1,2

• 1,1,

• 2,2

• 2

what is the electron configuration for calcium

• 2,7,7,3

• 2,8,8,1

• 2,8,8,2

• 2,7,7,4

What is the electron configuration for carbon

• 2,3

• 2,4

• 1,1,4

• 1,1,2,2

What is the electron configuration of aluminium?

• 10,3

• 2,11

• 2,8,2

• 2,8,3

How many valence electrons does magnesium have?

• 1

• 2

• 6

• 7

How many valence electrons does CHLORINE have?

• 1

• 2

• 6

• 7

How many valence electrons does NITROGEN have?

• 1

• 2

• 5

• 6

How many valence electrons does Lithium have?

• 1

• 2

• 6

• 7

An atom of lithium would want to:

• gain 1 electron

• gain 2 electrons

• lose 1 electron

• gain 1 electron

An atom of sodium would want to

• gain 1 electron

• gain 2 electrons

• lose 1 electron

• lose 2 electrons