Questions
Which of the following sets of atomic number belong to that of alkali metals?
a
1, 12, 30, 4, 62
b
37, 19, 3, 55
c
9, 17, 35, 53
d
12, 20, 56, 88
detailed solution
Correct option is B
Alkali metal symbol Atomic number Lithium Li 3 Sodium Na 11 Potassium K 19 Rubidium Rb 37 Caesium Cs 55 Francium Fr 87
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