Structure of Atom Test

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Structure of Atom Test - 4

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following statements does apply to atoms which are isotopes of the same element?

A
The sum of the number of protons and neutrons is the same.

B
The sum of the number of electrons and neutrons is the same.

C
The number of electrons outside the nucleus is the same.

D
The mass numbers are the same.

Solution

Isotopes are atoms of the same element having same number of protons/electrons but different number of neutrons.
Question 2
1 / -0

Which one of the following is not a valid value for the magnetic quantum number of an electron in a 5d sub shell?

A
1

B
3

C
2

D
5

Solution

For an electron in the 5d subshell the value of l = 2 and the magnetic quantum number ml can have values from –l,…0,…+l, meaning ml could not have a value = 3.
Question 3
1 / -0

The smallest particle of an element which can take part in chemical reactions and may or may not exist independently is the

A
Nucleus

B
Atom

C
Neutron

D
Compound

Solution

The basic unit of matter is the atom. It is the smallest particle of an element which can take part in chemical reactions and may or may not exist separately. It consists of sub-atomic particles, i.e., protons, neutrons and electrons.
Question 4
1 / -0

Calculate the value of azimuthal quantum number for the subshell notation 4d?

A
4

B
3

C
2

D
1

Solution

For d, the value of azimuthal quantum number is 2.
Question 5
1 / -0

The radius of the nucleus of an atom is approximately

A
10^-12 m

B
10^-15 m

C
1 nm

D
10^-10m

Solution

The radius of the nucleus is approximately 10^-15m.
Question 6
1 / -0

Electromagnetic spectrum shows all the forms of radiation except one of the following:

A
X-rays

B
Beta rays

C
Gamma Rays

D
Infra red

Solution

Beta rays are matter waves and not electromagnetic rays.
Question 7
1 / -0

Which of the following is not a type of electromagnetic radiation?

A
sound waves

B
red light

C
ultraviolet radiation

D
x-rays

Solution

Sound waves are longitudinal, mechanical pressure waves.
Question 8
1 / -0

Electromagnetic radiation travels through vacuum at a speed of __________ m/s.

A
186,000

B
3.00 × 10⁸

C
10,000

D
It depends on wavelength

Solution

The speed of light (electromagnetic radiation) through vacuum has a constant value of 3.00 x 10⁸ m/s and is independent of the wavelength in vacuum.

Question 9

1 / -0

Which of the following electronic configurations is impossible?

2s²2p⁶3s²3p²

1s²2s²2p⁶3s²3p⁶4s²3d¹

1s²2s²2p⁶3s²3p²4s²

1s²2s²2p⁶

Solution

The electronic configuration of the third option is not as per the various rules for filling of electrons in various orbitals i.e. Hund's rule of maximum multiplicity, Aufbau principle and Pauli exclusion principle.

Shell Name	Subshell Name	Subshell Max Electrons
K	1s	2
L	2s	2
L	2p	6
M	3s	2
	3p	6
	3d	10
N	4s	2
	4p	6
	4d	10
	4f	14

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Structure of Atom Test - 4

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Question 1

The sum of the number of protons and neutrons is the same.

The sum of the number of electrons and neutrons is the same.

The number of electrons outside the nucleus is the same.

The mass numbers are the same.

Solution

Question 2

1

3

2

5

Solution

Question 3

Nucleus

Atom

Neutron

Compound

Solution

Question 4

4

3

2

1

Solution

Question 5

10-12 m

10-15 m

1 nm

10-10 m

Solution

Question 6

X-rays

Beta rays

Gamma Rays

Infra red

Solution

Question 7

sound waves

red light

ultraviolet radiation

x-rays

Solution

Question 8

186,000

3.00 × 108

10,000

It depends on wavelength

Solution

Question 9

2s2 2p6 3s2 3p2

1s2 2s2 2p6 3s2 3p64s23d1

1s2 2s2 2p6 3s2 3p2 4s2

1s2 2s2 2p6

Solution

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10^-12 m

10^-15 m

10^-10m

3.00 × 10⁸

2s²2p⁶3s²3p²

1s²2s²2p⁶3s²3p⁶4s²3d¹

1s²2s²2p⁶3s²3p²4s²

1s²2s²2p⁶