Column A

Question

1.
The mass number of the element above is _______.
2.
The atomic number of the element above is ____.
3.
The element above has ________protons.
4.
The element above has _______ neutrons.

Column B
a.87
b.136
c.223
d.310

Answer 1

1. c. 223
2. a. 87
3. a. 87
4. d. 310