05-03-2015
Chemistry

Answered

19.B is the chemical symbol of which element?

Boron
Boring
Balkite
Beryllium

20.Zinc (Zn) has an atomic number of 30 and an atomic mass of 65. How many neutrons does a stable atom of Zn have?

30
35
60
95

Answer :

Аноним Аноним

05-03-2015

Number 1 is..Boron
Number 2 is ..35

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