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Get Answers to all your Questions
- #Medical
- #National Eligibility Cum Entrance Test
- #Class 11
- #Classification of elements and periodicity in properties
- #Chemistry
- #National Eligilibility Cum Entrance Test
Which among the following pairs of atomic numbers represents elements belonging to the same group?
(a) 11 and 19 (b) 12 and 30 (c) 13 and 31 (d) 14 and 33
Option: 1
a only
Option: 2
a and d only
Option: 3
a and c only
Option: 4
b and c only
Answers (1)
Atomic number 11 = Na which is Group 1 element
Atomic number 19 = K which is Group 1 element
Atomic number 13 = Al which is group 13 element
Atomic number 31 = Ga which is group 13 element
Hence option 3 is correct.
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