| 原子 | yuán zǐ | atom / atomic |  |
| 原子弹 | yuán zǐ dàn | atomic bomb / A-bomb | |
| 原子能 | yuán zǐ néng | atomic energy | |
| 马兰 | Mǎ lán | Malan military base and atomic test site in Bayingolin Mongol Autonomous Prefecture 巴音郭楞蒙古自治州[Ba1 yin1 guo1 leng2 Meng3 gu3 Zi4 zhi4 zhou1], Xinjiang |  |
| 原子核 | yuán zǐ hé | atomic nucleus | |
| 原子钟 | yuán zǐ zhōng | atomic clock | |
| 核裂变 | hé liè biàn | atomic fission / nuclear fission / fission | |
| 原子量 | yuán zǐ liàng | atomic weight / atomic mass | |
| 道尔顿 | Dào ěr dùn | Dalton (name) / John Dalton (1766-1844), British scientist who contributed to atomic theory | |
| 原子论 | yuán zǐ lùn | atomic theory | |
| 氘 |  dāo | deuterium 2H / heavy hydrogen, isotope of hydrogen having 1 neutron in its nucleus, so atomic weight 2 | |
| 氕 | piē | protium 1H / light hydrogen, the most common isotope of hydrogen, having no neutron, so atomic weight 1 | |
| 原子武器 | yuán zǐ wǔ qì | atomic weapon | |
| 原子序数 | yuán zǐ xù shù | atomic number | |
| 国际原子能机构 | Guó jì Yuán zǐ néng Jī gòu | International Atomic Energy Agency (IAEA) | |
| 国际原子能结构 | guó jì yuán zǐ néng jié gòu | International Atomic Energy Agency (IAEA) | |
| 内爆法原子弹 | nèi bào fǎ yuán zǐ dàn | implosion atomic bomb | |
| 日本原子能研究所 | Rì běn Yuán zǐ Néng Yán jiū suǒ | Japan Atomic Energy Research Institute | |
| 原子爆破弹药 | yuán zǐ bào pò dàn yào | atomic demolition munition | |
| 原子科学家 | yuán zǐ kē xué jiā | atomic scientist / nuclear scientist | |
| 原子科学家通报 | Yuán zǐ Kē xué jiā Tōng bào | Journal of Atomic Scientists | |
| 原子质量 | yuán zǐ zhì liàng | atomic mass | |
| 中国国家原字能机构 | zhōng guó guó jiā yuán zì néng jī gòu | China Atomic Energy Agency (CAEA) | |
| 中国国家原子能机构 | Zhōng guó Guó jiā Yuán zǐ néng Jī gòu | China Atomic Energy Agency (CAEA) | |
| 原子半径 | yuán zǐ bàn jìng | atomic radius | |
| 原子反应堆 | yuán zǐ fǎn yìng duī | atomic reactor | |
| 原子堆 | yuán zǐ duī | atomic pile (original form of nuclear reactor) | |
| 原子能发电站 | yuán zǐ néng fā diàn zhàn | atomic power station | |
| 巴拉迪 | Bā lā dí | Mohamed ElBaradei (1942-), Director of International Atomic Energy Agency 1997-2009 and Nobel Peace Prize laureate | |
| 核电荷数 | hé diàn hè shù | electric charge on nucleus / atomic number | |
| 被爆者 | bèi bào zhě | survivor of the atomic bombings of Hiroshima and Nagasaki (orthographic borrowing from Japanese 被爆者 / "hibakusha") | |
| 质子数 | zhì zǐ shù | proton number in nucleus / atomic number | |
| 质量数 | zhì liàng shù | atomic weight of an element / atomic mass | |
| 马兰基地 | Mǎ lán jī dì | Malan military base and atomic test site in Bayingolin Mongol Autonomous Prefecture 巴音郭楞蒙古自治州[Ba1 yin1 guo1 leng2 Meng3 gu3 Zi4 zhi4 zhou1], Xinjiang | |
| 欧洲原子能共同体 | ōu zhōu yuán zǐ néng gòng tóng tǐ | European Atomic Energy Community | |
| 原子蒸气激光同位素分离 | | atomic vapour laser isotope separation | |
| 原子粒种 | | atomic species | |
| 原子吸收分光光度法 | | atomic absorption spectrophotometry | |
| 伊朗原子能组织 | | Atomic Energy Organization of Iran | |
| 原子和分子数据计算机索引 | | Computer Index of Atomic and Molecular Data | |
| 伊拉克原子能委员会 | | Iraqi Atomic Energy Commission | |
| 联合国原子辐射影响问题科学委员会 | | United Nations Scientific Committee on the Effects of Atomic Radiation | |
| 原子能同位素和辐射应用于粮农发展司 | | Division of Isotope and Radiation Applications of Atomic Energy for Food and Agriculture Development | |
| 外聘审计团 | wài pìn shěn jì tuán | Panel of External Auditors of the United Nations, the Specialized Agencies and the International Atomic Energy Agency / Panel of External Auditors | |
| 建立欧洲原子能共同体条约 | | Treaty establishing the European Atomic Energy Community / EURATOM Treaty | |
| 国际和平利用原子能会议 | | International Conference on the Peaceful Uses of Atomic Energy | |
| 原子能委员会 | | Atomic Energy Commission | |
| 国际原子能机构规约 | | Statute of the International Atomic Energy Agency | |
| 阿拉伯原子能机构 | | Arab Atomic Energy Agency | |
| 国际原子能管制 | | international control of atomic energy | |
| 国际原子能机构筹备委员会 | | Preparatory Commission of the International Atomic Energy Agency | |
| 原子能管制委员会 | | Atomic Energy Control Board | |
| 联合国与国际原子能机构间关系协定 | | Agreement Governing the Relationship Between the United Nations and the International Atomic Energy Agency | |
| 国际原子能机构规约会议 | | Conference on the Statute of the International Atomic Energy Agency | |
| 国际原子能机构特权和豁免协定 | | Agreement on the Privileges and Immunities of the International Atomic Energy Agency | |
| 氯原子 | | atomic chlorine | |
| 原子发射探测器 | | atomic emission detector | |
| 原子氧 | | atomic oxygen | |
| 原子弹伤亡处理委员会 | | Atomic Bomb Casualty Commission | |
| 特种原子爆破装置 | | Special Atomic Demolition Munitions / nuclear backpack | |
| 特殊原子爆破弹 | | special atomic demolition munition / atomic landmine | |
| 原子吸收光谱法 | | atomic absorption spectrometry | |
| 欧洲原子论坛 | | European Atomic Forum | |
| 国际原子能开发机构 | | International Atomic Development Authority | |
| 日本原子工业论坛 | | Japan Atomic Industrial Forum, Inc. | |
| 两弹一星 | liǎng dàn yī xīng | (China's achievements of) producing an atomic bomb (1964) and hydrogen bomb (1967) and launching a satellite into space (1970) | |
