原げん子し

げ

ん

し

Common wordJLPTN1Freq.FrequencyTop 10,000

Meanings

1

noun

atom

physics chemistry

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.

Usage patterns

〈物もの〉は原げん子しから構こう成せいされるa substance is composed of atoms
すべての物ぶっ質しつは原げん子しから構こう成せいされている。
All matter is composed of atoms.
原げん子しが結けつ合ごうするatoms bond together
二ふたつの水すい素そ原げん子しが結けつ合ごうして水みず分ぶん子しができる。
Two hydrogen atoms bond together to form a water molecule.
原げん子しを分ぶん裂れつさせるto split an atom
核かく兵へい器きは原げん子しを分ぶん裂れつさせて巨きょ大だいなエネルギーを放ほう出しゅつする。

Kanji

原meadow, original, primitive
子child, sign of the rat, 11PM-1AM

Related words

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.

Don't confuse with· 6

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.

Show 3 more

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.

Counted with

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

Word family· 46

原げん子し力りょくN1
atomic energy; nuclear power
原げん子し核かく
atomic nucleus; nucleus
二に原げん子し
diatomic
原げん子し価か
valence; valency

Etymology

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.

原げん子し団だん

atomic group; group of atoms

Show 7 more

原げん子し戦せん
atomic war; nuclear war
原げん子し炉ろ
nuclear reactor; atomic reactor
原げん子し病びょう
radiation sickness
原げん子し症しょう
symptoms of atomic illness; radiation sickness symptoms
原げん子し砲ほう
atomic cannon
原げん子し線せん
atomic beam
原げん子し説せつ
atomic theory

See all 46 in Explore →