Radium is an alkaline earth metal.
metal
Radium selenide is likely to be ionic because radium is a highly electropositive metal while selenium is a nonmetal. In an ionic compound, radium is likely to donate its electron to selenium to form a stable compound.
Radon is a non-metal, an element. It belongs to group 18 and period 6 on the periodic table.
Radium forms an ionic compound with oxygen known as radium oxide (RaO). In this compound, radium, a metal, donates electrons to oxygen, a nonmetal, resulting in the formation of an ionic bond between them. Radium oxide is a solid compound with high ionic character due to the large difference in electronegativity between radium and oxygen.
Nails are metal.
Metal is metal. Nonmetal is everything else.
Is ceramic metal or nonmetal
Metal - metal compounds don't exist... Only metal-nonmetal and nonmetal-nonmetal
it can be a metal or nonmetal or metalliods
Tantalum is a metal.
nonmetal
nonmetal