General Knowledge - Chemistry - Discussion

Only proton are present in H atom.

It is simply the first element on the periodic table.

Hydrogen atom is a topest elements Periodictable but H contains 1 e- and 1proton no neutron. .

Hydrogen has three isotopes.

One is protium, second deutrium, third tritrium.

Protium is the only hydrogen isotopes whose abundance on the earth--- is more than that of the other two isotopes.

And by default we always consider protium has one proton n one electron and so it's mass is 1g.

Whereas, deutrium has one nuetron, one proton, n one electron and hence it's mass is 2g.

And, tritium has two nuetrons, one proton, one electron. Hence it's mass is 3g.

Aand B both are correct as it says 'only Hydrogen'. 2 neutrons and one proton means its Tritium.

Hydrogen has only one electron (electronic configuration) and proton, zero neutrons:
Atomic.no - Mass.no = 1 - 1
So, Neutron = 0.

Anyone, give more clarity about it.

Hydrogen is the first element means its atomic no. is 1. Hence it contain 1 proton and 1 electron(because no.of protons = no.of electrons).

Hydrogen is top element of the our periodictable.

Its atomic no is z-1 hence it containes one electrone.

1H1 is z=1 so it is proton.

e=1.