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  • Brainly User
2014-06-11T19:38:57+05:30

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₁H² is the symbol of deuterium 
atomic number is 1
mass number is 2
number of protons 1
number of electrons 1
number of neutrons 2-1 is 1
Correct answer is option (c) one proton and one neutron
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2014-06-11T20:00:55+05:30
Deuterium contains one proton and one neutron
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