Question

I need help on this its due Monday

Answer 1

The properties of the elements can be determined from their electron configuration

Further explanation

• Mg ⇒electron configuration :[Ne] 3s²

outer electron : 2 (3s²)

lose(2 electron)

charge : +2

cation (positive)

symbol : Mg²⁺

• Br⇒electron configuration : [Ar] 4s²3d¹⁰4p⁵

outer electron : 7 (4s²4p⁵)

gain ( 1 electron)

charge : -1

anion (negative)

symbol : Br⁻

Helium⇒electron configuration : 1s²

outer electron : 2 (1s²)

stabil(no gain/no lose)

charge : 0

neutral

symbol : He

• Nitrogen ⇒electron configuration : [He] 2s²2p³

outer electron : 5 ( 2s²2p³)

gain(3 electron)

charge : -3

anion

symbol : N³⁻