the decay of the neutrons in the nucleus of the atom
Lets let our mass equal 3 on alletals and solve using d=m/v equation
Aluminum
V=3/2.70=1.11
Silver
V=3/10.5=.286
Rhenium
V=3/20.8=.144
Nickel
V=3/8.90=.337
This gives us the following list from largest to smallest Aluminum, Nickel, Silver, and Rhenium
The electronegativity of an atom describes how much an atom attracts an electron, whether it be in a covalent bond or just on its own.