The nucleus of a hydrogen atom consists of" /> The nucleus of a hydrogen atom consists of, 1 proton only, 1 proton + 2 neutron, 1 neutron only, 1 electron only" /> The nucleus of a hydrogen atom consists of 1 proton only, 1 proton only, 1 proton + 2 neutron, 1 neutron only, 1 electron only" /> The nucleus of a hydrogen atom consists of"/> The nucleus of a hydrogen atom consists of, 1 proton only, 1 proton + 2 neutron, 1 neutron only, 1 electron only" />