In an element \( A \), the number of protons in an atom is 19 then, the no. of electron in its i... VIDEO
In an element \( A \), the number of protons in an atom is 19 then, the no. of electron in its ion \( \mathrm{A}^{+} \)is:
a. 18
b. 20
c. 19
d. 22
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