Question

Q 10. Using the part of the Periodic Table given below, answer
the following questions :
2
13
14
15
16
17
18
Groups 1
Periods
1
H
He
2
Li
Be
B
C
N
0
F
Ne
3
Na
AI
Si
P
S
CI
Ar
Mg
Ca
4
K
a. The elements Be, Mg and Ca each having two valence
electrons in their valence shells, which one of them is
least reactive?
b. Arrange the elements Na, Al, P and Cl in order of
decreasing atomic radius.
c. Arrange the elements Li, Na and K in the order of
increasing metallic Character.​

Answer 1

a) Be

b) Na>Al>P>Cl

c) Li<Na<K