﻿ Medical Entrance Exam Question and Answers | Structure of Atom - Zigya

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# Structure of Atom

#### Multiple Choice Questions

1.

Two electrons occupying the same orbital are distinguished by

• Magnetic quantum number

• Azimuthal quantum number

• Spin quantum number

• Spin quantum number

1693 Views

2.

Magnetic moment 2.84 BM is given by (At. no. Ni= 28, Ti= 22, Cr=24, Co = 27)

• Ni2+

• Ti3+

• Cr3+

• Cr3+

2504 Views

3.

The angular momentum of electrons in d orbital is equal to

827 Views

4.

What is the maximum number of orbitals that can be identified with the following quantum numbers?

n=3, l =1, m1 = 0

• 1

• 2

• 3

• 3

4451 Views

5.

Calculate the energy in joule corresponding to light of wavelength 45mm: (Planck's constant h=6.63 x10-34)Js; speed of light c= 3 x 108 ms-1)

• 6.67 x 1015

• 6.67 x 1011

• 4.42 x 10-15

• 4.42 x 10-15

1495 Views

6.

The value of Planck's constant is 6.63 x 10-34 Js. The speed of light is 3 x1017 nms-1 . Which value is closet to the wavelength in nanometer of a quantum of light with frequency of 6 x 1015 s-1 ?

• 10

• 25

• 50

• 50

7737 Views

7.

What is the maximum number of electrons that can be associated with the following set of quantum number?
n=3, l =1 and m=-1.

• 10

• 6

• 4

• 4

2636 Views

8.

Based on equation
E=-2.178 x 10-18 certain conclusions are written. Which of them is not correct?

• The negative sign in the equation simply means that the energy of an electron bound to the nucleus is lower than if would be if the electrons were at the infinite distance from the nucleus.

• Larger the value of n, the larger is the orbit radius

• Equation can be used to calculate the change in energy when the electron changes orbit

• Equation can be used to calculate the change in energy when the electron changes orbit

880 Views

9.

Maximum number of electrons in a subshell with l =3 and n=4 is

• 14

• 16

• 10

• 10

798 Views

10.

The correct set four quantum number for the valence electron of rubidium atom (z=37) is

• 5,1,1, +1/2

• 6,0,0,+1/2

• 5,0,0 +1/2

• 5,0,0 +1/2

816 Views