atomic mass number of element if no of electron are 9 and 10 neutron
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mass number is number of protons plus number of neutrons.
Number of protons is equal to the number of electrons.
So the mass number is 19.
Hope it helps you.
And please mark me as the brainliest one !!!
Number of protons is equal to the number of electrons.
So the mass number is 19.
Hope it helps you.
And please mark me as the brainliest one !!!
Answered by
0
since we know that ,electron =protone=9
atomic mass =no.of proton + no.of neutron
=9+10
=19A
atomic mass =no.of proton + no.of neutron
=9+10
=19A
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