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Question-1
The number of protons in an atom is called:
(A)
Mass number
(B)
Nucleons
(C)
Atomic radius
(D)
Atomic number
Question-2
The element used as medicines to treat mental disorders.
(A)
Sodium
(B)
Lithium
(C)
Potassium
(D)
Bromine
Question-3
The element nitrogen was discovered by:
(A)
Lavoisier
(B)
Berzelis
(C)
Rutherford
(D)
Helium
Question-4
Law of conservation of mass was proposed by:
(A)
John Dalton
(B)
Pronst
(C)
Rutherford
(D)
Lavoisier
Question-5
The centre of the atom is called:
(A)
Proton
(B)
Nucleus
(C)
Neutron
(D)
Electron
Question-6
The columns of elements in the periodic table are called:
(A)
Periods
(B)
Class
(C)
Family
(D)
Groups
Question-7
Law of definite proportions was devised by:
(A)
Joseph Proust
(B)
Rutherford
(C)
Lavoisier
(D)
Berzelins
Question-8
The sub - atomic particles around the nucleus is called:
(A)
Electrons
(B)
Protons
(C)
Neutrons
(D)
Positrons
Question-9
Atoms of an element that have different numbers of neutrons are called:
(A)
Isobars
(B)
Isotopes
(C)
Isotones
(D)
Isomer
Question-10
The atom which has only one proton in its nucleus is:
(A)
Nitrogen
(B)
Helium
(C)
Argon
(D)
Hydrogen
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Cambridge Secondary Grade 8
IGCSE
Practice in Related Chapters
Acid and Bases
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Patterns of Reactivity
Chemistry and the Environment
Using Chemistry
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