10 questions
Isotopes of an element have a different number of...
Protons
Neutrons
Electrons
Mass
Potassium-39 has how many neutrons?
19
18
20
21
Nickel-59 has how many neutrons?
30
31
32
33
Bromine-80 has how many neutrons?
41
42
44
45
12 protons and 13 neutrons
Mg-12
Mg-13
Mg-25
Mg-24.305