ISOTOPE, ISOBAR AND ISOTONIC

1). Isotope
Is the atom-atom from the same elements that (have the same atomic number) but different numbers mass.
Example:

2). ISOBAR
Is the atom-atom from a different element (atom has a different number) but have the same mass number.
Example:

3). ISOTONIC
Is the atom-atom from a different element (atom has a different number) but have the same number of neutrons.
Example: