
1) Anion 2) Bit 3) Chylomicron 4) Corpuscle 5) Grain 6) Inextension 7) Iota 8) Isotope 9) Isotopic 10) Monad 11) Mote 12) Particle
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https://www.crosswordclues.com/clue/atom

1) NRC concern 2) Accelerated bit 3) Accelerator bit 4) Accelerator item 5) AEC concern 6) AEC logo 7) American superhero 8) An energy source 9) Anagram for moat 10) Angstrom-diameter thing 11) Ararat director Egoyan 12) Ararat director, first name 13) Auteur Egoyan 14) Basic bit 15) Basic building block
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https://www.crosswordclues.com/clue/atom

Compare with molecule and ion. An atom is the smallest particle of an element that retains the chemical properties of the element. Atoms are electrically neutral, with a positively charged nucleus that binds one or more electrons in motion around it.
Found on
http://antoine.frostburg.edu/chem/senese/101/glossary/a.shtml

• (n.) Anything extremely small; a particle; a whit. • (v. t.) To reduce to atoms. • (n.) The smallest particle of matter that can enter into combination; one of the elementary constituents of a molecule. • (n.) A constituent particle of matter, or a molecule supposed to be made up of subordinate particles. • (n.) An ultima...
Found on
http://thinkexist.com/dictionary/meaning/atom/

Atom is the basic building block of chemistry. Atoms, also called chemical elements, can combine with one another to form compound. It is the smallest unit of matter that cannot be decomposed into simpler substances by ordinary chemical processes.
Found on
http://www.chemicalglossary.net/definition/153-Atom

A particle of matter which cannot be broken up by chemical means. Atoms have a nucleus consisting of positively-charged protons and uncharged neutrons of the same mass. The positive charges on the protons are balanced by a number of negatively-charged electrons in motion around the nucleus
Found on
http://www.encyclo.co.uk/local/20725

A particle of matter which cannot be broken up by chemical means. Atoms have a nucleus consisting of positively charged protons and uncharged neutrons of the same mass. The positive charges on the protons are balanced by a number of negatively charged electrons in motion round the nucleus.
Found on
http://www.encyclo.co.uk/local/20841

<chemistry, physics, radiobiology> A particle of matter indivisible by chemical means. It is the fundamental building block of the chemical elements. ... The elements, such as iron, lead and sulphur, differ from each other because they contain different kinds of atoms. There are about six sextillion (6 followed by 21 zeros or 6 x 1021) atoms ...
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http://www.encyclo.co.uk/local/20973

(at´әm) the smallest particle of an element that has all the properties of the element. adj., atom´ic., adj. There are two main parts of an atom: the nucleus and the electron cloud. The nucleus is made up of protons, which carry a positive electrical charge, and (except in hydrogen) neutrons, which contain one ...
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http://www.encyclo.co.uk/local/21001

A particle of matter which cannot be broken up by chemical means. Atoms have a nucleus consisting of positively-charged protons and uncharged neutrons of the same mass. The positive charges on the protons are balanced by a number of negatively-charged electrons in motion around the nucleus.
Found on
http://www.encyclo.co.uk/local/21076

the smallest particle of an element that can enter into a chemical reaction.
Found on
http://www.encyclo.co.uk/local/21808

The smallest particle that retains all the chemical properties of a given element.
Found on
http://www.encyclo.co.uk/local/22291

(Learning Modules / Chemistry / Polymers) The simplest unit which defines a particular element. Atoms are made up of protons, an equal number of electrons, and neutrons. Different atoms differ in their number of protons and electrons.
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http://www.encyclo.co.uk/visitor-contributions.php
At'om noun [ Latin
atomus , Greek ..., uncut, indivisible;
'a priv. + ..., verbal adj. of ... to cut: confer French
atome . See
Tome .]
1. (Physics) (a) An ultimate indivisible particle of matter.
(b) An ultimate particle of matter not ne...
Found on
http://www.encyclo.co.uk/webster/A/140
At'om transitive verb To reduce to atoms. [ Obsolete]
Feltham. Found on
http://www.encyclo.co.uk/webster/A/140

An evolving protocol for syndication and sharing of content. Atom is being developed as a succesor to and improvement over RSS and is more complex than RSS while offering support for additional features such digital signatures, geographic location of author, possibly security/encryption, licensing, etc. Like RSS, Atom is an XML-based specification....
Found on
http://www.matisse.net/files/glossary.html

Atom: The smallest part of any material that cannot be broken up by chemical means. Each atom has a center (the nucleus) which contains protons and neutrons. Electrons orbit around the nucleus. The atom is primarily empty space. If the nucleus of an atom were the size of the button on a baseball pitcher's cap, the electrons would be like dust parti...
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http://www.medterms.com/script/main/art.asp?articlekey=9609

An atom is the smallest quantity of a chemical element which can enter into combination or take part in a chemical reaction.
Found on
http://www.probertencyclopaedia.com/browse/GA.HTM

atom 1. Literally, “not cutable”, not divisible. 2. Originally, any of the indivisible particles postulated by philosophers as the basic component of all matter. 3. A tiny particle of anything; jot.
Found on
http://www.wordinfo.info/words/index/info/view_unit/2158/
mote noun (nontechnical usage) a tiny piece of anything
Found on
https://www.encyclo.co.uk/local/20974
noun (physics and chemistry) the smallest component of an element having the chemical properties of the element
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https://www.encyclo.co.uk/local/20974
Click images to enlargeSmallest unit of matter that can take part in a chemical reaction, and which cannot be broken down chemically into anything simpler. An atom is made up of protons and neutrons in a central nucleus (except for hydrogen, which has a single proton as its nucleus) surrounded by electrons (see atomic str...
Found on
https://www.encyclo.co.uk/local/21221

A building block of matter, the smallest particle that has the chemical characteristics of a particular chemical element. It contains a nucleus of protons and neutrons surrounded by a cloud of electrons.
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https://www.encyclo.co.uk/local/22327

Atom is a Dutch name for boys. The meaning is `Atom` The name Atom is most commonly given to American boys.
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https://www.pregnology.com/names/boys/Atom

A particle of matter which cannot be broken up by chemical means. Atoms have a nucleus consisting of positively-charged protons and uncharged neutrons of almost the same mass. The positive charges on the protons are balanced by a number of negatively-charged electrons in motion around the nucleus.
Found on
https://www.world-nuclear.org/nuclear-basics/glossary.aspx
No exact match found.