Atomic Structure Test

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Atomic Structure Test - 7

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Weekly Quiz Competition

Question 1
1 / -0

Nucleus is composed of two kinds of subatomic particles are-

A
protons and neutrons

B
electrons and neutrons

C
protons and electrons

D
none of the above

Solution

According to the question the correct option will be option ‘A’ because Nucleus is composed of protons and neutrons.
Question 2
1 / -0

Difference between ions and atoms is -

A
Relative size

B
Electronic configuration

C
Presence of charge

D
All of the above

Solution

According to the question the correct option will be option ‘D’ because An ion is a particle or collection of particles with a net positive or negative charge.

An atom is the basic unit of an element. The identity of an element is determined by the number of positively charged protons in atoms nucleus.
Question 3
1 / -0

All atoms contain neutrons in their nuclei except-

A
Protium

B
Helium

C
Neon

D
Chlorine

Solution

According to the question the correct option will be option ‘A’ because All atoms except Protium, an isotope of Hydrogen contain neutrons in their nuclei. As Protium has zero neutrons in the nucleus and has mass no 1 .Hence, the correct option is A
Question 4
1 / -0

The fraction occupied by nucleus in an atom is equalto-

A
1/10⁻¹⁰

B
1/10⁸

C
1/10⁻⁵

D
1/10⁵

Solution

According to the question the correct option will be option ‘D’ because

Radius of atom =10⁻¹⁰ m

Radius of nucleus =10⁻¹⁵ m

The fraction occupied by nucleus in an atom = $\frac{10^{- 15}}{10^{- 10}} = \frac{1}{10^{5}}$
Question 5
1 / -0

Protons and neutrons are heavier than electrons and reside in the center of the atom, which is known as-

A
the nucleus

B
the Orbit

C
the orbital’s

D
none of the above

Solution

According to the question the correct option will be option ‘A’ because Protons and neutron are present in the nucleus of the atom residing at the center.
Question 6
1 / -0

Rutherford’s experiment led to the discovery of atomic-

A
Orbit

B
Orbital

C
Nucleus

D
Atom

Solution

According to the question the correct option will be option ‘C’ because Rutherford's α particle experiment led to the discovery of Nucleus
Question 7
1 / -0

The size of the nucleus is measured in _______ units.

A
a.m.u.

B
Angstrom

C
Fermi

D
cm

Solution

The size of the nucleus is measured in fermi units.
1 Fermi $=10^{-15} \mathrm{m}$
Question 8
1 / -0

All the mass of the atom resides in-

A
nucleus

B
molecules

C
ions

D
orbit

Solution

According to the question the correct option will be option ‘A’ because all the mass of the atom resides in the nucleus.
Question 9
1 / -0

who experimentally proved the existence of protons in the atom?

A
Goldstein

B
J.J.Thompson

C
Chadwick

D
None of thea above

Solution

According to the question the correct option will be option ‘A’ because Goldstein experimentally proved the existence of protons in the atom. Since the atom is electrically neutral there must be positively charged particles present in the atom to neutralize the negative charges of the electrons.
Question 10
1 / -0

which of the following first coined the term 'atoms' meaning indivisible-

A
Rutherford

B
Thomson

C
Aristotle

D
Democritus

Solution

According to the question the correct option will be option ‘D’ because Several Western philosophers like Plato, Aristotle, Democritus, Lucretius, etc believed that matter is composed of extremely small and indivisible particles called atom.

Atom is a Greek word which means indivisible.

Atoms also mean indivisible and it was coined by Democritus.
Question 11
1 / -0

The number of protons present in the nucleus is called-

A
Atomic number

B
Mass number

C
Both a and b

D
None of these

Solution

According to the question the correct option will be option ‘A’ because Atomic number is defined as the number of protons present in the nucleus of an atom and it is denoted by "Z".
Question 12
1 / -0

.... is defined as the number of protons present in the nucleus of an atom.

A
Atomic number

B
Mass number

C
Both a and b

D
None of these

Solution

According to the question the correct option will be option ‘A’ because Atomic number is defined as the number of protons present in the nucleus of an atom and it is denoted by "Z".
Question 13
1 / -0

The nucleus of the hydrogen atom is known as-

A
neutron

B
electron

C
proton

D
nucleons

Solution

According to the question the correct option will be option ‘C’ because the nucleus of Hydrogen atom is called as proton as it has only 1 proton in it .Thus correct answer is option C.
Question 14
1 / -0

the particles present in the nucleus of an atom are-

A
the proton and the electron

B
the electron and the neutron

C
the proton and the neutron

D
none of these

Solution

According to the question the correct option will be option ‘C’ because the particles present in the nucleus of an atom are the proton and the neutron. Electrons are present outside the nucleus.
Question 15
1 / -0

Compared to size of its nucleus, the size of an atom is -

A
ten times greater

B
the same

C
a hundred times greater

D
one hundred thousand times greater

Solution

According to the question the correct option will be option ‘D’ because the radius of nucleus is of the order of 10⁻¹⁵ whereas the radius of atom is of the order of 10⁻¹⁰

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Atomic Structure Test - 7

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Atomic Structure Test - 7

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Question 1

protons and neutrons

electrons and neutrons

protons and electrons

none of the above

Solution

Question 2

Relative size

Electronic configuration

Presence of charge

All of the above

Solution

Question 3

Protium

Helium

Neon

Chlorine

Solution

Question 4

1/10−10

1/108

1/10−5

1/105

Solution

Question 5

the nucleus

the Orbit

the orbital’s

none of the above

Solution

Question 6

Orbit

Orbital

Nucleus

Atom

Solution

Question 7

a.m.u.

Angstrom

Fermi

cm

Solution

Question 8

nucleus

molecules

ions

orbit

Solution

Question 9

Goldstein

J.J.Thompson

Chadwick

None of thea above

Solution

Question 10

Rutherford

Thomson

Aristotle

Democritus

Solution

Question 11

Atomic number

Mass number

Both a and b

None of these

Solution

Question 12

Atomic number

Mass number

Both a and b

None of these

Solution

1/10⁻¹⁰

1/10⁸

1/10⁻⁵

1/10⁵