ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6) Question 13
ASMO Science · ASMO Science Olympiad 2015 — Level 2 (Years 5 & 6)
A Helium nucleus consisted of ___?

2 protons, 2 neutrons,2 electrons
2 protons, 2 neutrons
2 protons, 4 neutrons, 2 electrons
2 protons, 4 neutrons