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Online Tests
Science 7th Class English Medium Chapter 4 Online Test MCQs With Answers
Question # 1
An element with fifteen protons in its atomic nucleus has atomic numebr.
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5
10
15
20
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Question # 2
Area around nucleus where electrons are found are called.
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Orbit
Shell
Both a and b
None of these
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Question # 3
Formula showing maximum number of electrons in a shell.
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n2
2n2
3n2
4n2
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Question # 4
The central part of an atom is called.
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Electron
Proton
Neutron
Nucleus
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Question # 5
The numebr of electorns present in an atom s equal to number of.
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Nucleus
Neutrons
Proton
Atom
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Question # 6
How many periods are there is the Periodic table.
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Five
Six
Seven
Eight
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Question # 7
The negetively charged particle arod nucleus are called.
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Electron
Proton
Atom
Neutron
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Question # 8
There are ............ groups in periodic table.
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2
8
18
32
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Question # 9
The mass of an atom is almost due to the.
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Electron
Proton
Nucleus
Neutrons
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Question # 10
Atomic number of element presetnin period 2 and group 15 of the periodic table.
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4
5
6
7
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Question # 11
In .... elements are arranged in order of increasing atomic numbers.
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Group
Period
Orbit
Shell
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Question # 12
Letter K is used to express theshell around the nucleus of an atom.
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1st
2nd
3rd
4th
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