If element x has 79 protons, how many electrons does it have? electrons mark for review what's this?

In order to determine this, it is important to remember that because we are talking about an element, and a basic unit of an element is an atom, that is electrically neutral. We would be dealing with an equal number of protons and electrons.

In this case, the atom of the element X would have 79 electrons altogether distributed accordingly in their energy levels around the nucleus.

$100. 125 x 0.20 = 25125 - 25 = $100