CHEM 11 Chapter Notes - Chapter 2: Periodic Table, Relative Atomic Mass, Gallium
Document Summary
Atom : the smallest particle that an element can be divided into and still be identifiable. Atomic theory on which chemistry is founded on. Chemical compounds consist of atoms combined in specific ratios. The atoms of a given element differ from the atoms of all other elements atoms can combine mass of a carbon-12 atom. Chemical reactions change only the way atoms are combined in compounds. Atomic mass unit (amu): the unit for describing the mass of an atom, based on the. Atoms are neutral and have no net charge (since equal in number of proton and. ) just p: the number of protons in atoms of a given element. ) p + n : the sum of the protons and neutrons in an atom. electrons) Isotopes : atoms with identical atomic numbers but different mass numbers. The individual masses of the naturally occurring isotopes and the percentage of each must be known.
