Jan 9, 2026 · A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all matter is …

Steam and liquid water are two different forms of the same pure chemical substance, water. Picture of a formed molecule In chemistry, substance is a unique form of matter with constant chemical …

1 day ago · The City of Forest Park has issued an emergency alert as police and fire crews respond to an active chemical fire at an industrial site.

Oct 15, 2023 · A chemical is any substance with a definite composition and distinct properties. All matter is made of chemicals, regardless of whether it is natural or synthetic.

Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.

Chemical changes are different from physical changes, which don't result in a change in substances. One example of a physical change is when water freezes into ice.

CHEMICAL meaning: 1. any basic substance that is used in or produced by a reaction involving changes to atoms or…. Learn more.

The meaning of CHEMICAL is of, relating to, used in, or produced by chemistry or the phenomena of chemistry. How to use chemical in a sentence.

The U.S. Chemical Safety Board (CSB) is an independent, nonregulatory federal agency that investigates the root causes of major chemical incidents. Our public safety mission is to drive …

A chemical is any mix of raw elements: hydrogen + oxygen produce the chemical water. Water is created by a change in the chemistry of hydrogen and oxygen atoms — a chemical change.