Question

for the electron present in 1s orbital of helium atom, the correct set of values of quantum numbers is ____​

Answer 1

Answer:

Correct option is

B

2

Electron e

−1

s1 , has quantum number (1,0,0,+1/2)

Electron e

−1

s1, has quantum number (1,0,0,-1/2)

So the sum is 1 + 1 + -1/2 + 1/2 = 2

Answer 2

The correct set of values of quantum numbers is n=1,l=0,s=0, and m=0.

• The electronic configuration of the He atom is as follows-
• ${1s}^{2}$
• n is called the principal quantum number. For 1s orbital n=1.
• l is called the azimuthal quantum number and for s orbital, its value is 0.
• Here two electrons are present in the paired state so, s=0.
• Again the value of m or magnetic quantum number depends on l. As l=0 so, m is also 0.