When a radioactive atom emits an alpha particle, the original atom's atomic number decreases by four.

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

Name the element in group 17, period 2. (periodic table)

The atoms of a solid aluminum can are close together, vibrating in a rigid structure. if the can is warmed up on a hot plate, what happens to the atoms?