Question

What is the minimum atomic number of the
element which has at least five 3d electrons
in its ground state ?​

Answer 1

Answer:
atomic number =24,
Element name =chromium
Explanation:

Answer 2

Answer:

The atomic number of the element which has at least five 3d electrons in its ground state is 24.

Explanation:

• The atomic number of the element having at least 5 3d electrons (in-ground state) is 24.
• For a total of 10 electrons, there are five 3d orbitals, each of which can house up to two electrons.
• In the ground state, the element's electronic configuration is as follows:
• Z = $1s^{2} , 2s^{2} , 2p^{6} , 3s^{2} , 3p^{6}, 4s^{1} , 3d^{5}$
• And its atomic number is 2+2+6+2+6+1+5 = 24
• Thus, the element is chromium.