Which of the following statement is correct about the atom of an element ?
(a) an atom can have only protons and neutrons but no electrons.
(b) an atom can have only electrons and neutrons but no protons
(c) an atom can have only electron and proton but no neutron
(d) an atom must always have a proton, neutron and electron
(a) Name an element which does not contain a neutron.
(b) If an atom contains one electron and one proton, will it carry any charge or not?