Can we all create an unofficial mark scheme qs + answers
1) isotope - same no. protons, diff no. neutrons
92*1.6*10^-19/mass no. * 1.67*10^-something I got 3.7 * 10^something
3 electrons removed to 89
fill in - mass number stays the same, 93 protons, 0, -1 for beta minus particle and antineutrino
Kind of forget the rest lol everyone pitch in!