Question

Choose from the table letters (A to E) that represent
a. a pair of isotope
b. an clement with mass number 19
c. an element having mass number 37
Electron
Proton
Element
Neutron
18
18
A
22
17
17
18
9
9
10
7
C с
7
7
17
D
17
20
E
61​

Answer 1

Answer:

sorry I didn't get this