Question

88. Molybdenum, Mo is an element used in missile and aircraft parts. How many unpaired electrons are in Mo? 02 x 3 = .6 mol Catt a) b) c)5 ). c)0 This 00 L

Answer 1

Answer: 6 unpaired electrons

Explanation:

Electronic configuration represents the total number of electrons that a neutral element contains. We add all the superscripts to know the number of electrons in an atom.

Molybdenum is an element with atomic number of 42 and thus 42 electrons. The electrons are filled according to Afbau's rule in order of increasing energies and thus the electronic configuration in terms of noble gas is:

$[Kr]4d^55s^1$

The 5 electrons in d orbital and 1 electron in s orbital are unpaired. Thus there are 6 unpaired electrons