Chemistry - 9 Chapter - 3Atomic StructureTest - 9

Chemistry - 9 Chapter - 3
Atomic Structure
Test - 9

1. The size of an atom depends upon the size of its ________.

a) Outermost orbit
b) None is correct
c) Inner Orbit
d) Nucleus

2. What was not clearly explained in Rutherfords atomic model?

a) Existence of Nucleus
b) Existence of Protons
c) Existence of electron
d) Existence of Neutrons

3. Who presented a solution of the problems in 1913 encountered in Rutherfords atomic model.

a) Madam Curie
b) Henry Bequerel
c) Neil Bohr
d) James Chadwitch

4. Energy in first orbit (nearest to nucleus) is ________?

a) Higher then 2nd orbit
b) Highest
c) Lowest

5. When an electron jumps from higher energy orbit to lower energy orbit the energy is ________ in the form of ____________.

a) Emitted, radiations
b) Absorbed, radiations
c) Emitted, heat
d) Emitted, light

6. When an electron jumps from a lower energy orbit to higher energy orbit the energy is absorbed.

a) True
b) False

7. What is the unit of energy emitted or absorbed when electron jump from one orbit to another.

a) Amperes
b) Quantums
c) Volts
d) watts

8. Quantum number of the least energy orbit is 1 and 3rd orbit is _______.

a) 1/3
b) 0.3
c) 3
d) 3.01

9. Orbit of atom are numbered as?

a) A,B,C,D.
b) X,Y,Z.
c) K,L,M,N.

10. Orbit number M contains _______ electrons.

a) 8
b) 18
c) 64
d) 32

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