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- DictionaryAt·om/ˈadəm/
noun
- 1. the basic unit of a chemical element.
noun. at· om ˈa-təm. Synonyms of atom. 1. a. : the smallest particle of an element that can exist either alone or in combination. an atom of hydrogen. b. : the atom considered as a source of vast potential constructive or destructive energy. … a largely forgotten legacy of this country's conquest of the atom. William J. Broad.
Dec 15, 2021 · Atoms consist of a nucleus made of protons and neutrons orbited by electrons.(Image credit: Rost-9D via Getty Images) Jump to: Subatomic particles. History of the atom....
atom, 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.
Atom definition: the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons and protons and one or more electrons bound to the nucleus by electrical attraction; the number of protons determines the identity of the element..
Sep 21, 2019 · By. Anne Marie Helmenstine, Ph.D. Updated on September 21, 2019. An atom is the defining structure of an element, which cannot be broken by any chemical means. A typical atom consists of a nucleus of positively-charged protons and electrically neutral neutrons with negatively-charged electrons orbiting this nucleus.
noun [ C ] us / ˈæt̬·əm / Add to word list. physics. the smallest unit of any chemical element, consisting of a positive nucleus surrounded by negative electrons. Atoms can combine to form a molecule. (Definition of atom from the Cambridge Academic Content Dictionary © Cambridge University Press) Examples of atom. atom.
Chemistry library. Science. Chemistry library. Unit 1: Atoms, compounds, and ions. About this unit. This unit is part of the Chemistry library. Browse videos, articles, and exercises by topic. Introduction to the atom. Learn. Worked example: Atomic weight calculation. The mole and Avogadro's number. Ions and compounds. Learn.
