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Standard IX

Chemistry

Modern Periodic Table

The atomic nu...

Question

The atomic number of element is 17. The valency of element is _________.

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Solution

The correct option is A 1
The atomic no. of the element is 17.

The element is chlorine. The electronic configuration is 2,8,7.
So the valency = 8-7 = 1. Its valency is 1 and it is a non-metal and it is present in the 17 $^{t h}$ group. Its size is more than $F$ but less than $B r$ and $I$ .

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Similar questions

Q. An element X has a mass number 4 and atomic number 2. The valency of this element is:

Q. An element with atomic number

17

is placed in the group

17

of the long form periodic table. Element with atomic number

9

is placed above and with atomic number

35

is placed below it. Element with atomic number

16

is placed left and with atomic number

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is placed right to it. Which of the following statements are correct:
(i) Valency of the element with atomic number

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(ii) Elements with same valency have atomic number

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(iii) Valency of elements with atomic number

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and

35

is one
(iv) Element with atomic number

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and

35

Q. An element with atomic number

17

is placed in the group

17

of the long from periodic table. Element with atomic number

9

is placed above and with atomic number

35

is placed below it. Element with atomic number

16

is placed left and with atomic number

18

is placed right to it. Which of the following statements are correct?

a) Valency of the element with atomic number

18

is zero.

b) Elements with same valency will have atomic number

16

17

and

18

c) Valency of element with atomic number

9

17

and

35

is one.

d) Element with atomic number

17

is more electronegative than element with atomic number

16

and

35

The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of :

(a) 1

(b) 2

(d) 4

Q. Question 35
An element X has a mass number 4 and atomic number 2. Write the valency of this element.

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The atomic number of element is 17. The valency of element is _________.

The correct option is A 1The atomic no. of the element is 17.The element is chlorine. The electronic configuration is 2,8,7. So the valency = 8-7 = 1. Its valency is 1 and it is a non-metal and it is present in the 17th group. Its size is more than F but less than Br and I.

The correct option is A 1
The atomic no. of the element is 17.

The element is chlorine. The electronic configuration is 2,8,7.
So the valency = 8-7 = 1. Its valency is 1 and it is a non-metal and it is present in the 17 $^{t h}$ group. Its size is more than $F$ but less than $B r$ and $I$ .