Q.

If the atomic weight of an element is 12 times that of the lightest element and it has 6 protons, then it contains

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a

6 protons, 6 neutrons,6 electrons

b

6 protons, 12 neutrons,6 electrons

c

6 protons, 6 neutrons,12 electrons

d

6 protons, 12 neutrons,12 electrons

answer is A.

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Detailed Solution

Given, Atomic mass= mass no. (A)=12 times that of the lightest element(H)=12Atomic no.(Z)=6=no. of protons = no. of electrons (Since it is a neutral species)no. of neutrons=A-Z=12-6=6
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