Question

Calculate the effective charge of helium

Answer 1

the effective charge of helium is 0 . because it has one shell

Answer 2

Answer:

1.7

Explanation:

When an electron present in a multi-electron atom experiences a net positive charge then it is known as effective nuclear charge and it is represent as .

Formula for effective nuclear charge is as follows.

            = Z - S

where,      Z = number of protons in the nucleus of the atom

                 S = shielding constant

Since, we have to calculate for helium atom and its electronic configuration is .

So, for He atom value of S = 0.30 because the electrons are present in 1s orbital.

Therefore, calculate the effective nuclear charge for helium as follows.

                      = Z - S

                              = 2 - 0.30

                              = 1.7

Thus, we can conclude that the effective nuclear charge for helium is 1.7