Question

7.The number of protons in an atom of an element A is 19 then, the number of electron in its ion A+ is:
1 point
19
21
18
20
​

Answer 1

Answer:

the answer is 18

Explanation:

I hope it may help you

Answer 2

Answer:

if protons are 19 then electrons should also be 19 .

A+ means it loses a electron. Therefore no.of electrons in A+ is 19-1=18