In a short period, as atomic number increases, the valency of elements with respect to hydrogen:

increases

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decreases

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remains constant

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first increases and then decreases

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Solution

The correct option is C first increases and then decreases
In a short period as atomic number increases, the valency of elements with respect to hydrogen
first increases and then decreases
Example:
$L i H_{1}, B e H_{2}, B H_{3}, C H_{4}, N H_{3}, H_{2} O, H F$
$N a H, M g H_{2}, A l H_{3}, S i H_{4}, P H_{3}, H_{2} S, H C l$

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Similar questions

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.

(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. When elements are placed in the order of their increasing atomic number, the elements having the same number of valence shell electrons is repeated in such a way, so as to fall under :

Q. A trend common to both group I and VII elements in the periodic table as atomic number increases is :

Q. Which statement is correct with respect to the property of the elements with increase in atomic number in the carbon family?

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In a short period, as atomic number increases, the valency of elements with respect to hydrogen:

The correct option is C first increases and then decreasesIn a short period as atomic number increases, the valency of elements with respect to hydrogenfirst increases and then decreasesExample:LiH1,BeH2,BH3,CH4,NH3,H2O,HFNaH,MgH2,AlH3,SiH4,PH3,H2S,HCl