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An atom .X. has a mass of protons 36,740...

An atom .X. has a mass of protons 36,740 times that of electrons. Identify the correct representa tion of the atom. The number of neutrons is 1 unit less than the protons.

A

`""_(10)X^(20)`

B

`""_(10)X^(22)`

C

`""_(20)X^(40)`

D

`""_(20)X^(39)`

Text Solution

Verified by Experts

The correct Answer is:
D
Mass of electron = m
Mass of proton = 1837 `xx` m
No. of protons `=(36,740)/(1837)=20`
No. of neutrons = 19
Mass number = 39
Atomic number = 20
Representation of the atom or nuclide `to ""_(20)X^(39)`.
Hence, the correct option is (d).
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