Semmelweis entrance exam Chemistry - 2023 Questions + Answers Graded A+

The mole concept - Answer-A method that allows the relative number of reactant particles involved in a chemical reaction to be known Avogadro's number - Answer-number of representative particles in a mole, 6.02 X 10^23 Basic structures of atoms - Answer-There is a nucleus in the center surrounded by an electron cloud or field Quantum numbers - Answer-Quantum numbers describe values of conserved quantities in the dynamics of a quantum system. In the case of electrons, the quantum numbers can be defined as "the sets of numerical values which give acceptable solutions to the Schrödinger wave equation for the hydrogen atom" Common compounds - Answer-Water (H2O), table salt (NaCL); carbon dioxide (CO2); baking soda (NaHCO3); carbon monoxide (CO); sand or glass (SiO2) Periodic properties - Answer-chemical or physical properties that vary among elements according to trends that repeat as atomic number increases