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Ainat [17]
3 years ago
12

UHHH helpppp maya cause uh she d.a.n.g d.u.m.b.

Chemistry
2 answers:
inna [77]3 years ago
6 0

Answer:

17

Explanation:

the mass number of the element which is protons and neutrons is 17+18=35

electronic configuration is 2, 8, 7

valency of the element is 1 therefore the atomic number is 17

Ksivusya [100]3 years ago
4 0
It’s ...............17
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