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Q.

The atomic weight of an element is 39. The number of neutrons in its nucleus is one more than the number of protons. The number of protons, neutrons and electrons respectively in its atom would be

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a

20, 19, 20

b

19, 20, 19

c

20, 19, 19

d

19,19, 20

answer is A.

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Detailed Solution

K1939, P=19, E=19, N=20

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