Which type of radiation is the smallest in size?
alpha radiation
beta radiation
gamma radiation
positron radiation

C) gamma radiation

Explanation:

There are three major types of particles emitted during a radioactive decay. These include: alpha, beta and gamma particles. Positrons are essentially positively charged beta particles

Alpha particles tend to be slow moving and heavy. Beta particles are similar to electrons while gamma particles are the lightest, fast moving and highly penetrating.

a c d and f

just finished the assignment

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e