Question

the table below lists information about two common types of nuclear radiation. fill in the missing information. note: round masses to the nearest atomic mass unit (u). | name | matter or energy? | mass (u) | charge (e) | can be stopped by | | --- | --- | --- | --- | --- | | gamma | ○ matter ● energy | 0 | 0 | thick concrete wall | | alpha | ○ matter ○ energy | 4 | +2 | select |

Explanation:

Alpha radiation consists of alpha particles which are matter (helium nuclei). Alpha particles have relatively large mass and charge. Due to their large mass and charge, alpha radiation has low penetration power. It can be stopped by a thin sheet of paper.

Answer:

For the "matter or energy" column for alpha: matter. For the "can be stopped by" column for alpha: thin sheet of paper.