원자 Copy: has NO comma Hide Show Title search for "원자" Create this page or click title to fullsearch this page. 원자,atom 원자번호,atomic_number 원자식,atom 원자질량단위,atomic_mass_unit(amu) 원자핵,atomic_nucleus Found 5 matching pages out of 2034 total pagesYou can also click here to fulltext search.