All substances will change state at specific temperatures, known as their melting and boiling points. Many substances can exist as solids, liquids or gases, which are all different states of matter.

Copper and Nickel form a substitutional solid solution over the complete range of possible compositions of the alloy. The equilibrium "phase diagram" opposite shows the dependence of the alloys ...

In the solid state it forms an fcc crystal with a melting point of -189.4 C and a boiling point of - 185.8 C. The electronic configuration of Argon is (Ne)(3s 2)(3p 6). Its atomic radius is 0.098 nm.