Barium is a metal. It belongs to group 2 or alkali metals
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It nonmetal ! I know this one! I had it on a worksheet!
Gold is a metal on that classification. if there are any mor elements that you would like to know about you might want to visit this website http://education.jlab.org/
Barium is a metallic element and is typically found in nature as a monatomic (single atom) entity. However, in certain compounds and chemical reactions, barium can form diatomic molecules like BaCl2.
An element with 115 protons in its nucleus would likely be a metal. Elements with a large number of protons typically exhibit metallic properties due to their tendency to lose electrons and form positive ions.
Since all alkali metals form a 1+ ion, the number of alkali metal atoms in the formula should be equal to the charge on the negative ion.