Question

In modern periodic table, metals are towards the left hand side, non metals are towards
the right hand side & there is a zig zag line between them which contains metalloids. Metals are
electropositive, ie, they have a tendency to lose electrons. As the effective nuclear charge acting
on the valence shell electrons increases across a period, the tendency to lose electron will
decrease so metallic character decreases. Down the group, the effective nuclear charge
experienced by valence electrons is decreasing because the outermost electrons are further away
from the nucleus. Therefore, they can be lost easily & thus metallic character increases down the
group.
Non metals on the other hand, are electronegative. They tend to form bonds by gaining
electrons.
Non metallic charater increases along the period & decreases down the group.
i. Which of the following element is not a metalloid?
a. Ge b. As c. Ar d. Te
ii. The order of the metallic character of some element is N electronegative among these elements is
a. N b. P c. Sb d. Bi
iii. Which of the following statements is correct?
a. Electronegativity increases down the group.
b. Metallic character decreases down the group.
c. Effective nuclear charge decreases down the group.
d. The force of attraction between nucleus &the outermost electrons increases down the group.
iv. Which of the following property increases along the period?
a. Atomic size c. Electropositivity. b. Metallic character d. nonmetallic character
v. Which of the following is the most non metallic element?
a. P b. Cl c. Se d. Br

Answer 1

Answer:

1)C

3)C

2)D

4)A

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