Q15. Ah Element " " has 13 protoms, 13 electrons and 14 neutrons. Ansa
a) What is the mac number of
What is its valency? What is the number of valence electrons in
d) What is the type of conformed by X"? Why?
e) Name the scientists who discovered electrons and protons.
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Explanation:
a) mass no= p+n
13+14=27
b) EC- 2,8,3 therefore valency =+3
Electron j .j Thomson
proton -Rutherford
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