Question

Which element does the electron configuration 1s22s22p2 represent?
B
C
N
K

Answer 1

This is carbon! Add up the exponents and you'll get 6. The atomic number of 6 is Carbon.

Answer 2

Answer : The correct option is, carbon (C)

Explanation :

Element = Carbon

Atomic number of carbon = 6

The electronic configuration of carbon is,

`1s^22s^22p^2`

From the electronic configuration we conclude that

The number of electrons = 2 + 2 + 2 = 6 electrons

Element = Boron

Atomic number of carbon = 5

Number of electrons = 5

Element = Nitrogen

Atomic number of carbon = 7

Number of electrons = 7

Element = Potassium

Atomic number of carbon = 19

Number of electrons = 19

Therefore, the element is, carbon (C)