Answer: Please see explanation for answer
Explanation:Matching the descriptions to the correct element listed gives
Element Group Name Group No Metal/ Nonmetal/ Metalloid Description
Neon Noble gases 18 Non metal Colorless, tasteless, and odorless gas, unreactive, nonconductive.
Bromine Halogens 17 Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.
Beryllium Alklaline earth metal 2 Metal Silvery-white, ductile, malleable, conductive solid with a high melting point for this type of element
Platinum Platimum group metals 10 Metal Silvery white, relatively soft, low density, conductive solid that is not found as a free element in nature but commonly found combined in alloys with copper or nickel
Potassium Alkali Metals 1 Metal Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature
Silicon Carbon family 1`4 Metalloid Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor
Sulfur Calcogens 16 Non metal Pale yellow, odorless, brittle solid at room temperature, nonconductor
= 0.78 mol Mg₃(Si₂O₅)₂(OH)₂