the number of electrons will depend on the halogen under consideration. But all halogens have 7 valence electrons
6
Helium has 2 electrons
One
number of electons
Silicon (Si) has 14 electrons, 14 protons, and usually 14 neutrons.
10
about 16
it has 11 electrons
4
6
30 electons
One(1)
17 electrons.
Helium has 2 electrons
7 protons
One - assuming the atom is not an ion.
The Answer is 4.....!