If a radio-active atom goes through α decay, the atomic number will decrease by 4. o true o false

False

Explanation:

According to the laws of radioactive decay, when an atom undergoes an alpha decay, the mass number is decreased by 4 units and atomic number is decreased by 2 units .

Thus, it is false, as the atomic number is decreased by 2 units only.

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.