原げん子し

げ

ん

し

Common wordJLPTN1Freq.FrequencyTop 10,000

Meanings

1

Scientific term used in physics and chemistry. Refers to the smallest unit of a chemical element.

水すい分ぶん子しは二ふたつの水すい素そ原げん子しと一ひとつの酸さん素そ原げん子しからできている。

A water molecule is made of two hydrogen atoms and one oxygen atom.

原げん子しの構こう造ぞうについて学まなぶ。

Learn about the structure of the atom.

アトム
原子 is the standard Japanese scientific term for an atom, while アトム is a katakana loanword used mainly in casual or stylistic contexts.

分ぶん子しN1
原子 is a single atom, the basic unit of an element, while 分子 is a molecule formed when multiple atoms bond together.
素そ粒りゅう子し
原子 refers to an atom, whereas 素粒子 refers to an elementary particle that is smaller than and makes up an atom.
元げん素そN1
元素 refers to a type of atom classified by its number of protons (like 'carbon'), while 原子 (atom) is the actual physical particle itself.

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原げん始しN2
原子 (atom) is a homophone of 原始 (origin/primitive) with a completely unrelated meaning in physics.
原げん子し核かく
原子 refers to the whole atom, while 原子核 refers only to its dense central nucleus of protons and neutrons.
粒りゅう子し
原子 (atom) is the basic unit of an element, while 粒子 (particle) is a more general term covering atoms, dust, and other tiny bits of matter.

個こN5
counter for small objects; counter for pieces · counter for military units · individual; one person · counter for years of age difference; counter for school years

From 原 (origin, fundamental) and 子 (small thing, child). A Meiji-era coinage as a translation of the Western scientific concept 'atom'.

Nuclear weapons release enormous energy by splitting atoms.

原げん子し価か

valence; valency

atomic group; group of atoms

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