(a(i))[3]
Complete Table 9.1 by naming each particle and giving the sign of its charge. One row has already been completed for you.
(a(ii))[2]
Several isotopes of beryllium exist. State what the word isotope means.
(b)[1]
Suggest which source of background radiation is in region D.
(c(i))[1]
State how many protons are in this radon atom.
(c(ii))[1]
State how many particles there are in the nucleus of this radon atom.