Those are all t or f questions, !
1.radioactivity is always dangerous.
2.bananas have radioactivity
3.radioactivity is a nuclear process
4.all nuclei are radioactive
5.all types of radiation are equally dangerous
6.radioactivity is permanent
7.a sample with higher activity than other sample is always harder to keep under control
8.a sample with longer half life time than other sample is always harder to keep under control
9.137-ba has a half life of 2.6min, that means that after 2.6 min it will not be radioactive anymore.
10.two samples of the same radioactive nucleus can have different activities
11.two samples of the same radioactive nucleus can have different half lives
12.all radioactivity is man made
13.when a person gets irradiative with a radioactive source he/she becomes radioactive