The are two isotopes having a different number of neutrons but the same number of protons.
Caesium and Xenon, with 36 isotopes each
Negative reciprocal slopes always represent perpendicular lines.
Only some special diagrams represents isotopes of the same element.
Are they isotopes
The number of protons (the same as atomic number) is specific for all isotopes.
The two notations represent atoms that are isotopes of the same element is 121 Sn and 119 Sn. The atomic mass of an element is defined as the weighted average mass of that elements naturally occurring isotopes.
Isotopes are not typically charged because they have the same number of protons as the element they represent. Isotopes differ in the number of neutrons but maintain the same overall charge due to an equal number of protons and electrons.
A pair or duo.
A point.
A battle field
One could be part of a factor pair.
Because of conservation of matter the nucleus would weigh the same as the sum of the two isotopes.