Question

(iii)Arrange the following elements in the order of their increasing nonmetallic character

Li, O, C, Be, F

a) F < O < C < Be < Li

b) Li < Be < C < O< F

c) F < O < C < Be < Li

d) F < O < Be < C < Li​

Answer 1

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The correct sequence of increasing non-metallic character of elements given Li, O, C, Be, F is:

b) Li < Be < C < O < F

Explanation:

• We know that, metals are in the left side and central position of the periodic table. And non-metals occupy the right side of the blocks.

• Hence, from moving across the period (left to right) the non-metallic character increases.

Now coming to the elements:

• Li is a alkali metal in group I. It is followed by Be in further groups.

• C, O and F are non-metals and as F is just next to noble gases, it has the highest non-metallic character.

• Oxygen comes after Carbon group wise, hence oxygen is more non-metallic.

In this way, the least is Lithium, then, Beryllium, then carbon followed by oxygen, and finally the highest one is Fluorine (a halogen).

Answer 2

The correct sequence of increasing non-metallic character of elements given Li, O, C, Be, F is:

b) Li < Be < C < O < F

Explanation.

We know that, metals are in the left side and central position of the periodic table. And non-metals occupy the right side of the blocks.

know that, metals are in the left side and central position of the periodic table. And non-metals occupy the right side of the blocks.Hence, from moving across the period (left to right) the non-metallic character increases.