Question

The atomic number of an element is 71. is this element diamagnetic or paramagnetic?

Answer 1

Paramagnetic

Step-by-step explanation:

Paramagnetic are those which has unpaired electrons and diamagnetic are those in which all electrons are paired.

Given the atomic number - 71

The electronic configuration is -

`1s^22s^22p^63s^23p^63d^(10)4s^24p^64d^(10)5s^25p^64f^(14)5d^16s^2`

The electron in 5d orbital = 1

This 1 electron will be unpaired as electron is first singly filled.

Thus, the element is paramagnetic as the electron is unpaired.

Answer 2

The element with atomic number 71(lutetium) is paramagnetic

This is because all its electrons is not paired . lutetium has electron configuration of (Xe) 4f^14 5d^1 6S^2
Its 5d sub shell is not paired since the d sub shell can accommodate a total of 10 electrons hence lutetium is paramagnetic