Question

Number the elements sodium, magnesium, phosphorus, and chlorine in the predicted order ionization energies from the highest to the smallest.

PLEASE HELP FAST!!!

Answer 1

Chlorine 1
Phosphorus 2
Magnesium 3
Sodium 4

Answer 2

The order of ionization energies from the highest to smallest is as below

Chlorine -1 ( highest)

phosphorus -2

magnesium-3

sodium-4 (smallest)

Step-by-step explanation

• sodium, magnesium,phosphorus and chlorine are in period three in periodic table.

• The trend of ionization energy across period 3 is that it increases across the period ( from the left to the right).

• The ionization energy increases across the period 3 because there are more protons in each nucleus which led to increase in nuclear charge across the period. ( from left to the right)

• This led to increase in force of attraction between nucleus and outer electron.( from the left to the right)

• among the four element given above from the left of period 3 , Sodium is 1st element followed by magnesium, then phosphorus and then chlorine.

• Therefore since sodium is in left side it has the smallest ionization energy while chlorine has the highest ionization energy since is is located at the fur right of period 3.