Q.5) a) Show diagrammatically the electron distribution and the composition of the nucleus of a Sodium atom.
b) in the following table the mass no, and the atomic no. of certain elements are given:
B
C
E
F.
ELEMENTS
MASS NO. 2
ATOMIC NO. 1
3
0 m
4
2
31
15
19
13
11
Now answer the following: -
How many neutrons are there in an atom of F?
ii) State the valency/ valency's of E
Name two atoms which are isotopes.
iv) Name the noble gas
(5 marks)​