How are matter classified as organic matter?

Organic matter (or organic material) is matter that has come from a once-living organism; is capable of decay, or the product of decay; or is composed of organic compounds. The definition of organic...

Matter is normally classified by its physical properties. Solids have particles that, though vibrating, do not move past each other. Liquid particles can pass each other but always stay in close...

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Substances are any form of matter (things that have mass and occupy space). They can be solids, liquids, or gases. Elements are the simplest and most basic of substances. There are a little over a...

Alkaline earth metals, Alkali metals, Halogens, Noble gases