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Variation of Metallic Properties

Rewrite the f...

Question

Rewrite the following statements after correction, if necessary :

(i) Elements in the same period have the equal valency

(ii) The metallic character of elements in a period increases gradually on moving from left to right.

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Solution

(i) Elements in the same group have equal valency.

(ii) The metallic character of the elements in a period decreases gradually on moving from left to right.

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Q. Rewrite the following statements after correction, if necessary:

(i) Elements in the same period have equal valency
(ii) The metallic character of elements in a period increases gradually on moving from left to right.

Give scientific reasons:

1. Atomic size increases down the group.

2. Metallic character decreases from left to right in a period.

3. Elements in the same group show same valency.

Q. How do metallic character and valency of elements change in a period moving left to right in modern periodic table?

Q. Rewrite the following statements after correction, if necessary:

(a) Groups have elements with consecutive atomic numbers.
(b) Periods are the horizontal rows of elements.
(c) Isotopes are the elements of the same group.

Q. Assertion :The oxidizing power of elements increases from left to right along a period. Reason: As we move from left to right, electronegativity of elements increases, so they have less tendency to loose electrons and non-metallic character of elements increases

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