Periodic Table and Periodicity AFCAT Questions

AFCAT Chemistry

Periodic Table and Periodicity MCQ Questions


1.
In Mendeléev's Periodic Table, the elements were arranged on the basis of their fundamental property, _____ and also on the similarity of chemical properties.
A.
Atomic mass
B.
Mass number
C.
Physical properties
D.
Durability
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ANSWER :
A. Atomic mass
2.
Mendeléev’s Periodic Table contains horizontal rows called _____
A.
Physical properties
B.
Wave number
C.
Groups
D.
Periods
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ANSWER :
D. Periods
3.
According to Newlands, how many elements were existed in nature?
A.
115
B.
100
C.
94
D.
56
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ANSWER :
D. 56
4.
The earliest attempt to classify the elements resulted in grouping the then known elements as
A.
Natural and man-made
B.
Chemical and physical
C.
Metals and non-metals
D.
None of these
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ANSWER :
C. Metals and non-metals
5.
Electronic configuration of _____ resembles that of alkali metals.
A.
Hydrogen
B.
Helium
C.
Lithium
D.
Carbon
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ANSWER :
A. Hydrogen
6.
When the three elements in a triad were written in the order of increasing atomic masses, the atomic mass of the middle element was roughly the _____ of the atomic masses of the other two elements
A.
Product
B.
Average
C.
Difference
D.
Sum
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ANSWER :
B. Average