about 16
17 electrons.
30 electons
7 protons
The Answer is 4.....!
One - assuming the atom is not an ion.
In one atom of Oxygen there are 8 electrons
60
Six in the outer (2nd) shell
An oxygen atom has six (6) electrons in its outer shell.
Ionic
If this atom has 43 electron it must have 43 protons to be a neutral atom of no charge.
positive