Florine has an atomic number of 9 and an atomic mass of 18.998 amu. How many protons, neutrons, and electrons present

There are 9 protons and 9 neutrons. there are 10 electrons

Explanation:

the electronic configuration of an atom with eight electrons is 1s²2s²2p⁴. the orbital diagrams are shown in the figure.

as per the hunds rule:

1. electrons tend to avoid being in the same orbital as per as practicable.

2. electrons in different orbitals of the same energy will have their spin parallel.

this can be illustrated from the multiplicity of the orbitals of the atom. as there are four electrons in the p orbital and p orbital has 3 sub-shells. the electrons can be fed in different ways as shown in the figure but the correct orbital diagram will be as per the hunds rule.

elements make up everything, and they combine to make compounds.

the answer is c