Answer:
10
Explanation:
Sodium has 11 electrons when it is neutral. This sodium isn't neutral, it has a +1 charge. The +1 charge means it has lost 1 electron.
11 - 1 = 10
it’s easy
number of proton =the number of element
ex. Hydrogen= 1 proton, carbon=6, neon=10
electrons can sometimes have 1 or 2 extra
