Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 1

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9th CBSE

IMPORTANT

Earn 100

The valency of chlorine $({}_{17}^{35}{Cl})$ which is a non-metal is:

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Important Questions on Structure of Atom

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 2

The valency of phosphorus

({}_{15}^{31}P)

a non-metal is:

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IMPORTANT

Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 3

The valency of metal aluminium

({}_{13}^{27}{Al})

is:

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 4

The number of electrons and protons in an atom is 8 each. The atomic number of the element is:

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 5

An atom has 12 protons and 12 neutrons. Its mass and atomic numbers are:

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 6

The numbers of electrons and neutrons in tritium

({}_{1}^{3}H)

is :

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 7

Sodium ion has :

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Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 8

If

Z

=

3

, the valency of the element is:

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IMPORTANT

Core science chemistry>Chapter 4 - Structure of Atom>EXERCISE 4B>Q 9

If

Z = 17

, the valency of the element is: