A change that produces matter with a different composition is
called a

Adozen is 12, and your needing to calculate the weight of one medium egg, so i would do 21/12=1.75 per egg, and check your answer by doing 1.75 * 12= 21 : ) : ): ): ): ) i hoped i

Hey how did you manage to type such a big lab report

It shows that the experiment is designed properly.

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium