Electron Configuration Exercises

Write ₁₀Ne main shell electron configuration! (Separate between shell using "space" ex: 2 8 8 2

Determine the group and periodicity of the following atoms!

• IIIA and 2

• IIA and 2

• VA and 3

• IVA and 1

Determine the electron configuration of atoms with group IVA and period 3!

• 2 8 8 4

• 2 4 4

• 2 8 4

• 2 8 18 3

An atom has mass number 16. How many neutron this atom has if the atom located at group 6 period 2?

• 8 neutron

• 10 neutron

• 14 neutron

• 8 proton

Write ₅₆Ba main shell electron configuration!

• 2 8 18 18 10

• 2 8 18 18 8 2

• 2 8 18 28

• 2 8 18 8 18 2

If Ca²⁺ has 18 electron, determine group and period of Ca atom!

• IIA and 4

• VIIIA and 3

• IVA and 2

• XA and 3

what is the maximum electron capacity of the N atomic shell?

• 2

• 8

• 18

• 32

Potassium is one of important ingredients of fertilizers, it has mass number 39 and 20 neutron. Determine main shell electron configuration of potassium!

• 2 8 8 1

• 2 8 8 2

• 2 8 9

• 2 18

What is the electron configuration of this atom?

• 2 6 10

• 2 8 18

• 2 8 8 4

• 2 8 8

How many valence electrons does this element has?

• 2

• 8

• 12

• 4