Question

Na, Mg and Al are the elements of third period of modern periodic table having

group number 1, 2 and 3 respectively. Which of these element has the

(i) highest valency,

(ii) largest atomic radius and

(iii) maximum chemical reactivity?

Justify your answer stating the reason for each​

Answer 1

Answer:

aluminium has the highest valency

sodium will hav largest atomic radius

sodium will hav maximum chemical reactivity cos it is at the extreme left of the periodic table

Answer 2

Al has the highest valency as it has 3 valence electrons. Its atomic number is 13[2,8,3). Na has a largest atomic radius as atomic radius decreases across a period from left to right. Na as the tendency to lose electrons decreases across a period from left to right