Sagot :
Answer:
True
Explanation:
Helium-4 atom is the stable isotope of helium with relative atomic mass 4.002603. The most abundant (99.99 atom percent) isotope of naturally occurring helium. It contains an alpha-particle.
Answer:
true po
Explanation:
kasi true lang sagot ko tama naman kasi eh may mass ang beryllium na 8