For example the aptitude to form cations in solution. And generally metals are solids, hard, with good thermal and electrical conductivity, etc.
No that is not true. The number of PROTONS determines what the element is.
No. The element's atomic number determines how it forms compounds.
Metal is not an element. It is a term used to classify an element, but it is not an element.
The number of protons.
protons
The number of protons determines the element's atomic number. When combined with the number of neutrons, it determines the element's atomic mass.
Carbon is an element. It is a non metal
a metal element
Copper metal is an element.
overall charge
69
protons