Structure Of The Atom Mock Tests

28 questions available

Structure Of The Atom Mock Test 1

Questions: 28

Sample Questions

Class 9 Science

Which of the following particles in an atom has no electric charge?

A Proton

B Electron

C Neutron

D Positron

Class 9 Science

Which of the following statements about isotopes is correct?

A Isotopes have different chemical properties

B Isotopes have different physical properties

C Isotopes have different number of protons

D Isotopes always have equal number of neutrons

Class 9 Science

An atom has 11 protons, 11 electrons and 12 neutrons. What is its mass number?

A 22

B 11

C 23

D 33

Class 9 Science

An element has electronic configuration 2, 8, 4. To which group of the periodic table does it belong?

A Group 4

B Group 14

C Group 4

D Group 18

Class 9 Science

Which of the following particles was discovered first?

A Neutron

B Electron

C Proton

D Nucleus

Class 9 Science

What is the valency of an element with atomic number 17?

A 7

B 1

C 8

D 17

Class 9 Science

Isotopes of an element differ in the number of:

A Protons

B Electrons

C Neutrons

D Protons and electrons

Class 9 Science

Isotopes of an element have different:

A Number of protons

B Mass number

C Chemical properties

D Atomic number

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