Atomic Structure Test

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Atomic Structure Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following substances consists of atoms of same type?

A
Molecule

B
Compounds

C
Elements

D
Mixtures
Question 2
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Mass number is the sum of ________ and ________ present in an atom.

A
protons and electrons

B
electrons, neutrons and protons

C
protons and neutrons

D
electrons and neutrons
Question 3
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Number of atoms present in the molecule of an element is known as ________ of an element.

A
valency

B
atomic number

C
atomicity

D
mass number
Question 4
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Which of the following is a substance which is made up of atoms of two or more than two different types of elements, when combined together chemically?

A
Iron

B
Diamond

C
Lime water

D
Graphite

Solution

A compound is formed by the chemical combination of two or more elements in a fixed proportion by mass.

Among the listed substances limewater (Calcium hydroxide; Ca(OH)₂) is a compound.

The constituent elements are calcium, hydrogen and oxygen.
Question 5
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Which of the following is a molecule of an element?

A
Water

B
Ozone

C
Salt

D
Sugar
Question 6
1 / -0

Components of which of the following can be separated most easily?

A
Atom

B
Molecule

C
Compound

D
Mixture
Question 7
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Which of the following particles are present inside the nucleus of an atom?

(i) Protons
(ii) Neutrons
(iii) Electrons

A
(i) and (ii)

B
(ii)

C
(ii) and (iii)

D
(i)

Solution

Protons and neutrons are present inside the nucleus, collectively known as nucleons whereas electrons are present outside the nucleus and revolve around the nucleus in fixed energy shells called orbits.
Question 8
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Under which of the following categories would you classify metalloids?

A
Element

B
Compound

C
Molecule

D
Mixture

Solution

Metalloids are categories under elements.
Question 9
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In nitrogen atom seven electrons are present. What is the atomic number of nitrogen?

A
7

B
14

C
8

D
16
Question 10
1 / -0

In which of the following elements, atoms exist independently?

A
Hydrogen

B
Nitrogen

C
Helium

D
Oxygen

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Atomic Structure Test - 1

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Atomic Structure Test - 1

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SHARING IS CARING

Question 1

Molecule

Compounds

Elements

Mixtures

Question 2

protons and electrons

electrons, neutrons and protons

protons and neutrons

electrons and neutrons

Question 3

valency

atomic number

atomicity

mass number

Question 4

Iron

Diamond

Lime water

Graphite

Solution

Question 5

Water

Ozone

Salt

Sugar

Question 6

Atom

Molecule

Compound

Mixture

Question 7

(i) and (ii)

(ii)

(ii) and (iii)

(i)

Solution

Question 8

Element

Compound

Molecule

Mixture

Solution

Question 9

7

14

8

16

Question 10

Hydrogen

Nitrogen

Helium

Oxygen

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