Given the same species as listed in Exercise 33, which has

(a) Equal numbers of neutrons and protons;

(b) Protons contributing more than 50% of the mass;

(c) About 50% more neutrons than protons?

Exercise 33

Which of the following species has

(a) Equal numbers of neutrons and electrons;

(b) Protons, neutrons, and electrons in the ratio 9:11:8;

(c) A number of neutrons equal to the number of protons plus one-half the number of electrons?

24Mg2+, 47Cr, 60Co+, 35CF, 124Sn+, 226Th, 0Sr