Match the following:
| 1. Isotope | a. Atoms of the elements have the same mass number and different atomic numbers. |
| 2. Isobar | b. Atoms of elements having the same number of neutrons. |
| 3. Isotone | c. Atoms contain the same number of electrons. |
| 4 Isoelectronic | d. Atoms of elements have the same atomic number but a different mass number. |
1
1-c, 2-a, 3-b, 4-d
2
1-d, 2-a, 3-b, 4-c
3
1-a, 2-d, 3-b, 4-c
4
1-d, 2-b, 3-a, 4-c