Question

Or
(a) The elements of the third period of the Periodic Table are given below:
Group I II III IV V VI VII
Period 3 Na Mg Al Si P S C1
(a) Which atom is bigger, Na or Mg? Why?
(6) Identify the most (i) metallic and (ii) non-metallic element in Period 3.
(b) Table given below shows a part of the Periodic Table.
H
He
Li Be B C N O F Ne
Na Mg Al Si P S a Ar
Using this table explain why
(i) Li and Na are considered as active metals.
(ii) Atomic size of Mg is less than that of Na.
(iii) Fluorine is more reactive than Chlorine.​

Answer 1

Answer:

a. Na is bigger

b. Na,Mg. ( metals)

p,s,Cl,Ar ( non metals)

ii. yes

III. no