If an atomic nucleus spontaneously emits two protons and two neutrons, then a(n) __________ particle has been emitted.
a. alpha
b. beta
c. gamma ray
d. neutron

Question

If an atomic nucleus spontaneously emits two protons and two neutrons, then a(n) __________ particle has been emitted.
a. alpha	
	 b. beta	
	 c. gamma ray	
	 d. neutron

.sam. · Answer

What element consist of two protons and two neutrons?

maddyx · Answer

should be an alpha particle. You see, the mass number has decreased by 4 ( 2 for proton and 2 for neutron) and atomic number has decreased by 2 (for 2 protons). it is definitely alpha particle.