What will be the trend of valency on moving right to the first group of the periodic table?

Increases

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Decreases

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Increases and then decreases

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Decreases and then Increases

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Solution

The correct option is C
Increases and then decreases

On moving right of the periodic table the atomic number of elements increases. Since, the valency of the first group element is 1, the valency increases on moving right till it reaches 4 and then again it starts decreasing.

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Similar questions

(i) Electropositive nature of the element(s) increases down the group and decreases across the period
(ii) Electronegativity of the element decreases down the group and increases across the period
(iii) Atomic size increases down the group and decreases across a period (left to right)
(iv) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element which shows maximum valency.

Q. Question 48(e)
(a) Electropositive nature of the element(s) increases down the group and decreases across the period
(b) Electronegativity of the element decreases down the group and increases across the period
(c) Atomic size increases down the group and decreases across a period (left to right)
(d) Metallic character increases down the group and decreases across a period.
On the basis of the above trends of the Periodic Table, answer the following about the elements with atomic numbers 3 to 9.

Name the element which shows maximum valency.

Q. On moving from left to right in a period of the periodic table, the atomic number of elements increases. What happens to the size of atoms of elements on moving from left to right in a period?

(a) increases
(b) decreases
(c) remain the same
(d) first increases then decreases

Q. Question 25
On moving from left to right in a period in the periodic table, the size of the atom.

(a) increases
(b) decreases
(c) does not change appreciably
(d) first decreases and then increases

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What will be the trend of valency on moving right to the first group of the periodic table?

The correct option is C Increases and then decreases On moving right of the periodic table the atomic number of elements increases. Since, the valency of the first group element is 1, the valency increases on moving right till it reaches 4 and then again it starts decreasing.

The correct option is C
Increases and then decreases

On moving right of the periodic table the atomic number of elements increases. Since, the valency of the first group element is 1, the valency increases on moving right till it reaches 4 and then again it starts decreasing.