ATP1 2. Chemical Level of Organization Atoms & Molecules Atoms: smallest stable units of matter Protons = + charge, are designated p+ Electrons = - charge, are designated e– Neutrons = no charge, are neutral. Atomic mass refers to the number of protons & neutrons Atomic number: number of protons in the nucleus of the atom Isotopes: one of the different forms of an element, distinguished from one another by different numbers of neutro.. 2020. 10. 26. 이전 1 다음 반응형
