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Question

If the atomic weight of an element is $$23$$ times that of the lightest element and it has $$11$$ protons, then it contains:


A
11 protons, 23 neutrons, 11 electrons
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B
11 protons, 11 neutrons, 11 electrons
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C
11 protons, 12 neutrons, 11 electrons
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D
11 protons, 11 neutrons, 23 electrons
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Solution

The correct option is C $$11$$ protons, $$12$$ neutrons, $$11$$ electrons
Number of electron = number of proton  
Hence,
number of electrons $$=11$$
and number of protons $$=11$$
The lightest element is hydrogen which has atomic weight 1.
Thus, an atomic weight of the element will be 23.
number of neutron = mass number - atomic number 
$$=23-11=12$$ 

Chemistry

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