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
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'
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.
