5. 5
19
Answer the following questions from the given table.
ELEMENT
MASS NUMBER
ATOMIC
NUMBER
A
14
7
В.
9
C С
20
10
D
23
E
9
4
i) How many electrons are present in E?
ii) Which is an inert gas?
iii) Which element has valency of 3?
iv) How many neutrons are present in D?
iv) Which element will form a cation with one positive charge?​