[ **up: [[Matter and energy]]** ] --- # Atoms The smallest unit of any [[Elements (Chemical)|element]] is an atom.[^1] --- ## Structure and properties of atoms [[2024-0815. Atoms are made up of subatomic particles such as the proton, electron, and neutron.|'Atoms are made up of subatomic particles such as the proton, electron, and neutron.']][^2] [^1]: Lindsay M. Biga, et al., ‘1.2. Structural Organization of the Human Body’, in *Anatomy & Physiology* (Corvallis, OR: Oregon State University, 2019), https://open.oregonstate.education/aandp/chapter/1-2-structural-organization-of-the-human-body/. [^2]: Lindsay M. Biga, et al., ‘1.2. Structural Organization of the Human Body’, in *Anatomy & Physiology* (Corvallis, OR: Oregon State University, 2019), https://open.oregonstate.education/aandp/chapter/1-2-structural-organization-of-the-human-body/.