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Standard VII

Chemistry

Atomic Valency

The atomic nu...

Question

The atomic number of an element which shows a valency of $+ 3$ is :

13

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32

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33

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17

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Solution

The correct option is A $13$
Atomic number of element is $13$ has electronic configuration of $2, 8, 3$ so it has valency $+ 3$ ,which are the electrons present in outer shell.

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Similar questions

Q. If the atomic number of an element is 17 and it has 18 neutrons in its atom, its valency will be _________.

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

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

18

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

18

0

(ii) Elements with same valency have atomic number

16, 17

and

18

(iii) Valency of elements with atomic number

9, 17

and

35

is one
(iv) Element with atomic number

17

is more electronegative than elements with atomic number

16

and

35

Write the electronic configuration of the element with atomic number 17. Indicate the valency of the element.

(a) What are valence electrons? Where are valence electrons situated in an atom ?

(b) What is the number of valence electrons in the atoms of an element having atomic number 13 ? Name the valence shell of this atom.

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The atomic number of an element which shows a valency of +3 is :

The correct option is A 13Atomic number of element is 13 has electronic configuration of 2,8,3 so it has valency +3,which are the electrons present in outer shell.

The atomic number of an element which shows a valency of $+ 3$ is :

The correct option is A $13$
Atomic number of element is $13$ has electronic configuration of $2, 8, 3$ so it has valency $+ 3$ ,which are the electrons present in outer shell.