No. Neon is a member of the Noble Gas family, and as such is a colourless, odourless gas which cannot react with any other chemical elements or compounds. Neon has a freezing temperature of about -250 degrees. I'm not sure many people know what it looks like, however I can say with certainty it would would not be metalloid at all. It would probably be a transparent solid similar to solid nitrogen, though it would be a face cubic crystal instead of hexagonal.
Sulfur is classified as a nonmetal. It is a nonmetallic element found in group 16 of the periodic table.
Neon-20 is used for the same things as any other natural isotopes of neon. E.G. it is used to make neon lights and helium-neon lasers. Neon-20 isotopic concentration may be important for some geological or volcanlogic studies.
No, the neon color in neon highlighters does not come from the element neon. It is typically a bright, fluorescent color that is used for coloring the ink in the highlighter.
No, neon gas in a neon sign is not a compound. Neon gas is an element. In neon signs, the neon gas lights up when an electric current passes through it, producing the characteristic bright glow.
There is no such thing as a compound element. Something cannot be both an element and a compound Neon is an element and so is made of nothing but neon. Neon does not form any compounds.
metaloid and metal
A metaloid will generally have a very high melting point.
no, a metal
There are several metaloids and each has a different number of electrons than the others metaloid elements have.
carbon
An element of the periodic table, it is a metaloid.
Chromium is a Metal.
shut the hell up
Cadmium is a metal.
No, sodium is not a metaloid. It is a metal, specifically an alkali metal, due to its properties such as being highly reactive and having a low melting point.
Berkelium is a metal.
Gold is a metal.