With which of the following electronic configuration of an atom has the lowest ionisation enthalpy?

Question

With which of the following electronic configuration of an atom has the lowest ionisation enthalpy? (A) 1s2 , 2s2, 2p5 (B) 1s2,2s2 2p3 (C) 1s2,2s2 2p6,3s1 (D) 1s2 , 2s2 2p6

Tardigrade Admin · Accepted Answer

The electronic configuration 1s2,2s2 2p6,3s1 shows lowest ionisation energy because this configuration is unstable due to the presence of one electron in s-orbital. Hence, less energy is required to remove the electron.

Q. With which of the following electronic configuration of an atom has the lowest ionisation enthalpy?

$1 s^{2}, 2 s^{2}, 2 p^{5}$

$1 s^{2}, 2 s^{2} 2 p^{3}$

$1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$

$1 s^{2}, 2 s^{2} 2 p^{6}$

The electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$ shows lowest ionisation energy because this configuration is unstable due to the presence of one electron in s-orbital. Hence, less energy is required to remove the electron.

Q. With which of the following electronic configuration of an atom has the lowest ionisation enthalpy?

1s2,2s2,2p5

1s2,2s22p3

1s2,2s22p6,3s1

1s2,2s22p6

The electronic configuration 1s2,2s22p6,3s1 shows lowest ionisation energy because this configuration is unstable due to the presence of one electron in s-orbital. Hence, less energy is required to remove the electron.

$1 s^{2}, 2 s^{2}, 2 p^{5}$

$1 s^{2}, 2 s^{2} 2 p^{3}$

$1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$

$1 s^{2}, 2 s^{2} 2 p^{6}$

The electronic configuration $1 s^{2}, 2 s^{2} 2 p^{6}, 3 s^{1}$ shows lowest ionisation energy because this configuration is unstable due to the presence of one electron in s-orbital. Hence, less energy is required to remove the electron.