Question

What is a property that only some metals have?

Answer 1

There are many ecceptions : see below and chose

Explanation:

metals are ductile and malleable but also some plastic materials are
metals are shining, but also Iodine and diamonds are
metals conduct electrical current but also Graphite does
metals are solid at the enviromental themperature but mercury is liquid

metals have a little electronegativity valour but Gold has an elecronegativity (2,5) bigger than hydrogen (2,1)
metals has small oxidation number (generally <4), but Os has also 8 as oxidation number (the biggest among all)
metals give with oxigen, basic solid Oxides with an hight melting point (but `SiO_2` melts at 1729 °C)and some oxides can be amphoteric