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atom

[ˈætəm]

atom Definition

the basic unit of a chemical element, consisting of a nucleus of protons and neutrons, with electrons in orbit around the nucleus.

Using atom: Examples

Take a moment to familiarize yourself with how "atom" can be used in various situations through the following examples!

  • Example

    The atom is the smallest unit of matter that retains the properties of an element.

  • Example

    The number of protons in an atom's nucleus determines its atomic number.

  • Example

    Atoms can combine to form molecules through chemical reactions.

atom Synonyms and Antonyms

Synonyms for atom

Phrases with atom

  • the process of breaking apart the nucleus of an atom, often used to generate nuclear energy

    Example

    The discovery of splitting the atom led to the development of nuclear weapons.

  • the process of adding or removing electrons from an atom, resulting in the formation of ions

    Example

    Ionization of atoms is important in many chemical reactions.

  • the number of protons in the nucleus of an atom, which determines its position in the periodic table

    Example

    The atomic number of carbon is 6.

Origins of atom

from Greek 'atomos', meaning 'indivisible'

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Summary: atom in Brief

An 'atom' [ˈætəm] is the basic unit of a chemical element, consisting of a nucleus of protons and neutrons, with electrons in orbit around the nucleus. It is the smallest unit of matter that retains the properties of an element and can combine to form molecules through chemical reactions. Phrases like 'splitting the atom' and 'ionization of atoms' refer to processes involving the manipulation of atoms. 'Atomic number' denotes the number of protons in the nucleus of an atom, which determines its position in the periodic table.