The document is a vocabulary quiz about basic chemistry terms including: - Atomic number, isotope, compound, ion, non-molecular substance, proton, neutron, electron - Elements in the compound NaHCO3 - Number of atoms in the compound H2CO3 - Hydrogen as the element with average atomic mass of 1.0079 - Zinc as the element with 30 protons and average of 35.39 neutrons - Universal notation examples such as 2H, 32S, 201Hg, 103Ag-2, 185W+2