Name a species which has (i) one proton and one electron (ii) one proton and two electrons

The mass of one mole of proton and electron is

Compare the radii of two species X and Y. Give reasons for your answer. (a) X has 12 protons and 12 electrons (b) Y has 12 protons and 10 electrons.

Compare the radii of two species X and Y. Give reasons for your answer. (a) X has 12 protons and 12 electrons (b) Y has 12 protons and 10 electrons.

Name the element whose atom contains only one proton and one electrons.

Is it possible for the atom of an element to have one electron, one proton and no neutron. If so, name the element.

Is it possible for the atom of an element to have one electron, one proton and no neutron. If so, name the element.

Which of the following is a one electron species ?

Which of the following is a one electron species ?