Answer:
One atom lf helium has a mass of 4 u
Know that 1 u =1.66. 10-24g
8E24/6.022E23= 13.28 moles, where the denominator is Avagadro's number
It is an alpha decay because when this phenomena occurs an atomic nucleus emits an alpha particle (helium nucleus) and consequentially decays into another atom with a mass number that is reduced by four an atomic number that is reduced by 2 two. The helium atom consists of two protons and two neutrons.
Therefore, the answer is <span>alpha decay because alpha particles have two protons and two neutrons</span>
Heya!
HERE IS YOUR ANSWER:
Electrons = 50
Atomic number = 50
so, the Element is stannum (Sn)
