Q1 of 23 Page 34

The simplest atom that does not contain neutron is

The simplest atom that does not contain neutron is hydrogen (protium). The mass number (atomic mass) of hydrogen is 1 and no. of proton is 1.


Hence, no. of neutron = Mass number – No. of proton


No. of neutron = 1-1 = 0


Thus, the hydrogen atom does not contain neutron.


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