Noun Atom Definition and Examples







The smallest particle of a chemical element that can exist.
  1. 'Once removed from an atom, an electron may in turn ionize other atoms or molecules.'
  2. 'It reminds me of cell division in an embryo or the arrangement of atoms in a molecule.'
  3. 'At the time, it was believed that electrons colliding with atoms always lost energy.'
  4. 'This is caused by the movement of an atom or group of atoms from one position to another.'
  5. 'Radioactive atoms decay into stable atoms by a simple mathematical process.'
  6. 'By the end of the century J. I. Thomson would reveal that atoms could also be divided into parts.'
  7. 'The electric field set up inside the tube excites atoms of mercury gas, making them emit ultraviolet light.'
  8. 'Since all the variety we see around us is just a product of different arrangements of a few types of atom, nanotech has been hyped as a potentially limitless miracle technology.'
  9. 'Bacteria that can break down chlorinated compounds have been known for years, but none that could remove the last chlorine atom to complete the detoxification.'
  10. 'In simulations it is possible to calculate atom density, mass density, and electron density profiles.'
  11. 'Lam says that teleporting single atoms and molecules could be perfected within the next ten years.'
  12. 'Water seems like the perfect energy source, packed, as it is, with two atoms of hydrogen per molecule.'
  13. 'Each radium atom is decaying into four more alpha-emitting radionuclides, creating in all 12,500 particles.'
  14. 'the power of the atom'
  15. 'Over the centuries, people have turned to steam, to coal, to oil, even to the atom for their energy.'
  16. 'The towering mushroom cloud is usually regarded as a symbol of the Nuclear Age, but in fact this phenomenon was first witnessed eighty-five years ago, before the power of the atom was recognised or released.'
  17. 'One day soon, man is going to be able to harness incredible energies, maybe even the atom, energies that could ultimately hurl us to other worlds in some sort of spaceship.'
  18. 'Will they turn the awesome power of the atom upon themselves as we have done?'
  19. 'America rose up and rebelled, and then expanded in power until it tipped the balance during World War One and harnessed the power of the atom to win World War Two.'
  20. 'After all, they had lived at the end of fifty years of fantastic technological advancement, with powered flight becoming common, the power of the atom having been harnessed and computers having been created.'
  21. '‘Today we're just going to learn about atom splitting,’ she started off.'
  22. 'Bohr and Heisenberg are among the first to realize that in splitting the atom mankind has acquired the power to destroy itself.'
  23. 'She says that the Supreme One is present in every atom of this world.'
  24. 'It is the height of hypocrisy for him to complain that Darwinism lacks causal specificity when his own theory lacks any specificity, including one atom of historical concreteness.'
  25. 'Instead I just stood and stared at the sign and remembered their halcyon days when I loved them with every atom of my being.'
  26. 'He was their property, heart and soul, body and blood; what they did claimed every atom of him, sleeping and waking; it colored life and dictated the terms of death.'
  27. 'Every atom of me still wants to hold on to those childish beliefs that sometime in the future it will all be different.'
  28. 'Every particle, every atom of me is alive in some way I cannot explain.'
  29. 'Was this, as I suspected in every atom of my being, a cooked sausage that just wasn't properly cooked?'
  30. 'Staring at the endless universe, looking at the twinkling stars and pondering the infinitesimally tiny atom of matter or the gene that makes us up, helps to put issues of religion in true perspective.'
A level of amateur sport, typically involving children aged between nine and eleven.
  1. 'After having fielded a bantam team for several years, the Storm is now putting together an atom program open to players aged nine and 10.'
  2. 'His hour-long presentation in the curling lounge at the Omniplex proved helpful to many people attending including Chad Anker, an atom level coach from Calgary.'
((n.) An ultimate indivisible particle of matter.|--|(n.) An ultimate particle of matter not necessarily indivisible; a molecule.|--|(n.) A constituent particle of matter, or a molecule supposed to be made up of subordinate particles.|--|(n.) The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule.|--|(n.) Anything extremely small; a particle; a whit.|--|)


1. Physics. 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. an atom with one of the electrons replaced by some other particle: muonic atom; kaonic atom.

2. Energy. this component as the source of nuclear energy.

3. a hypothetical particle of matter so minute as to admit of no division.

4. anything extremely small; a minute quantity.


"There can be atom smashers."
"There can be atom positions."
"There can be atom victims."
"There can be atom types."
"There can be atom tests."
"There can be atom reactors."
"There can be atom pairs."
"There can be atom lasers."
"There can be atom fora."
"There can be atom swarms."
"There can be atom spies."
"There can be atom slow downs."
"There can be atom sites."
"There can be atom plants."
"There can be atom people."
"There can be atom parameters."
"There can be atom names."
"There can be atom masses."
"There can be atom layers."
"There can be atom hydrogens."

Late 15th century: from Old French atome, via Latin from Greek atomos ‘indivisible’, based on a- ‘not’ + temnein ‘to cut’.

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