find the valency if atomic number is 7 and mass number is 14
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0
Answer:
outermost shell 2and 5,,, then valency is 5
Answered by
1
Explanation:
atomic number 7=2,5 electronic configuration
so valence electrons are greater than 4 so 8-valence electrons so answer would be 8-5 =3
answer is 3
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