what element has 2 protons, 2 neutrons and 2 electrons.
What element has 3 protons, 3 neutrons and 3 electrons.
What element has 11 protons, 11 neutrons and 11 electrons.
What element has 3 protons, 3 neutrons and 3 electrons.
What element has 11 protons, 11 neutrons and 11 electrons.