Which property of isotopes is important in dating
The atomic number is roughly equivalent to an element’s numeric place in the periodic table, and in broad lines dictates how an element tends to behave.All isotopes of an element have the same atomic number.
In other words, isotopes are atoms of the same element — but some just weigh more.
In relative terms, there isn’t a huge difference in the neutrons’ share in their cores: they represent 50%, and 66.6% of the atoms’ weight in H-2, H-3, and 50% and 54-ish% of the total mass in C-12 and C-13.
In absolute terms, though, the difference is immense: one neutron will double the mass of a hydrogen atom — two neutrons will triple it.
Therefore, one extra neutron in the core can For example, two of hydrogen’s natural isotopes, H-2 and H-3, have 1 and 2 neutrons respectively.
Carbon (Z=6) has 2 stable isotopes: C-12 and C-13, with 6 and 7 neutrons respectively.