Class 9 Chemistry MCQ
The no.of elements in the first period is
2
8
18
23
An ________________ scientist arranged the elements in order in periodic table.
English
Italian
African
Indian
The number of periods is:
6
7
8
9
Which one of the following halogen has lowest electronegative?
fluorine
chlorine
bromine
iodine
4th & 5th consist of ________________ elements.
8
18
32
infinite
The periodic table consist of ________________ columns.
Periods
Rows
Column
Nil
The right most position in the periodic table is occupied by:
Alkall metals
Alkaline earth metals
Translation metals
Noble gasses
________________ is the shortest period.
6th
8th
2nd
1st
Along the period which one of the following decrease:
Atomic radius
ionization energy
electron affinity
electronegative
The base of modern periodic table is
Atomic number (Z)
Mass number (A)
(‘radio-button-click-target’, “Avogadro’s Number”)
Quantum Number
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