An isotope is a group of atoms from an element with the_______ # of electrons & protons, but a _______ number of neutrons.
Isotopes have similar chemical properties because chemical reactions only involve _______ & not neutrons.
An example of this is chlorine-35 & chlorine-37. Both are isotopes of chlorine. But their mass number is different. They both react similarly with sodium to form sodium chloride, NaCl (table _______ ).
On the other hand, the physical properties are affected by mass and because isotopes have different masses, there physical _______ are also different. An example of this is hydrogen-2 or deuterium has a slightly higher boiling point & density than hydrogen-1.