Question

what occurs during a metastable isotopes gamma emission? *
chemical reaction
nuclear particle rearrangement
complete atomic transformation
mass creation
what is the composition of an alpha particle? *
three protons and one neutron
one electron and one proton
two protons and two neutrons
one proton and one neutron
review: what type of nuclear decay only emits energy? *

Explanation:

1. Gamma - emission from a metastable isotope is a nuclear - process where the nucleus transitions from a higher energy state to a lower energy state without changing the number of protons and neutrons. It is a nuclear particle rearrangement at the energy level of the nucleus. Chemical reactions involve electrons, not just nuclear processes. Complete atomic transformation occurs in processes like alpha or beta decay. Mass creation violates conservation laws.
2. An alpha particle is equivalent to a helium - 4 nucleus, which consists of two protons and two neutrons.
3. Gamma decay is the type of nuclear decay that only emits energy in the form of gamma rays. There is no change in the number of protons or neutrons, just a release of excess energy from the nucleus.

Answer:

1. Nuclear particle rearrangement
2. Two protons and two neutrons
3. Gamma decay