: Students use reports to communicate findings on atomic structure , focusing on observations from simulations or experiments like flame tests and spectrometry.
: A standard unit used to express the mass of atoms; protons and neutrons each have a mass of approximately , while electrons are roughly Atomic Keys
: Protons and neutrons together make up the mass number ( : Students use reports to communicate findings on
), which is unique to each element and determines its position on the periodic table . Atomic Keys