Compounds and elements Maddy Larken

Introduction

Compounds are two or more different atoms chemically bonded together. Elements are one single atom. The different substances are not chemically joined together. Each substance in the mixture keeps its own properties. The compound has properties different from the elements it contains. Each substance is easily separated from the mixture. Elements: Oxygen, Hydrogen, Carbon. Compounds: Water, Ionic, Oxide. Mixtures: Sugar, Salt, Gravel.

Compound I Chose

The compound I chose was quartz. Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is silicon dioxide (SiO2). Quartz is one of the most common minerals in the Earth's crust. It is found is all forms of rock: igneous, metamorphic and sedimentary. Quartz can be used in the manufacture of glass and ceramics and for foundry molds in metal casting.

Quartz

Quartz chemical number is Si02, and its atomic mass is 60.08 g. You can use quartz in making glass making, abrasive, foundry sand, hydraulic fracturing proppant, gemstones.

When molten silicon dioxide SiO2 is rapidly cooled, it does not crystallize but solidifies as a glass. Fluorine reacts with silicon dioxide.

Credits:

Created with images by Andre_Rau - "groynes sea baltic sea" • alusruvi - "rock crystal clear to white gem top" • James St. John - "Molybdenite vein in quartz monzonite (latest Cretaceous to earliest Tertiary, 62-66 Ma; Continental Pit, Butte Mining District, Montana, USA) 3" • James St. John - "Ruggles Pegmatite-Littleton Formation contact (Ruggles Pegmatite Mine, New Hampshire, USA)" • www.metaphoricalplatypus.com - "Rose Quartz Earrings" • James St. John - "Amethyst (Colorado, USA) 2" • monicore - "amethyst stone crystal"

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