Question

Two elements P and Q belong to the 3rd period of the modern periodic table and are in Group-1 and Group-2 respectively. Compare their following characteristics in tabular form
i. The number of electrons in their atom
ii. The size of their atoms
iii. The metallic characters
iv. Their tendencies to loose electrons
v. The formula of their oxides
vi. The formula of their halides
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Answer 1

Answer:

p is Na and Q is Mg

Explanation:

i. Na=11 electron,Mg=12

ii. Na is larger than Mg as it has less nuclear effective energy.

iii. Na is more metallic due ease tendency to lose electron.

IV. Na >Mg

v. Na2O , MgO

vi. NaX , MgX2. [x is a halogen ]