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Bookmark or Share- Matter, elements, and atoms | Chemistry of life (article) - Khan AcademyAn atom is the smallest unit of matter that retains all of the chemical properties of an element. Introduction. What is your body made of? Your first thought might be that it is made up of different organs—such as your heart, lungs, and stomach—that work together to keep your body going.
- 2.2: Atomic Structure - Chemistry LibreTextsFigure 2.2.1 2.2. 1: The Structure of the Atom. Atoms have protons and neutrons in the center, making the nucleus, while the electrons orbit the nucleus. The modern atomic theory states that atoms of one element are the same, while atoms of different elements are different.
- Basic concept and structure of an atom | Britannicaatom, Smallest unit into which matter can be divided and still retain the characteristic properties of an element. The word derives from the Greek atomos (“indivisible”), and the atom was believed to be indivisible until the early 20th century, when electrons and the nucleus were discovered.
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- Introduction to the atom (video) | Khan AcademyIntroduction to the atom. Learn how atoms are made up of protons, neutrons, and electrons. Elements are defined by the atomic number, the number of protons in the nucleus. The mass of an atom is determined by the total number of protons and neutrons. Created by Sal Khan.
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