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Five elements A, B, C, D and E have atomic number 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are |
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(a) |
A, B, C |
(b) |
B, C, D |
(c) |
A, D, E |
(d) |
B, D, E |
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Five elements A, B, C, D and E have atomic number 2, 3, 7, 10 and 18 respectively. The elements which belong to the same period of the periodic table are |
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(a) |
A, B, C |
(b) |
B, C, D |
(c) |
A, D, E |
(d) |
B, D, E |