SEMMELWEIS ENTRANCE
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
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
◍ Atomic number is the same as.
, Answer: number of protons
◍ Atomic mass is the same as.
Answer: Number of protons and neutrons
◍ Different types of chemical bonding.
Answer: metallic, covalent, ionic
◍ What is covalent bonding and how does it work?.
Answer: when atoms share one or more pairs of electrons. They have similar
electronegativities
◍ What is ionic bonding?.
Answer: when atoms transfer electrons. Large difference in electronegativity
◍ Examples of ionic bonds.
Answer: NaClCs2OMgONH4NO3
◍ Examples of covalent bonds.
Answer: F2, O2, N2, H2, CL2, HCL, H2O
◍ What is metallic bonding?.
Answer: the chemical bonding that results from the attraction between metal
atoms and the surrounding sea of electrons
◍ What is hydrogen bonding?.
Answer: Hydrogen bonding is the strongest intermolecular force. it only
happens when hydrogen is covalently bonded to fluorine, nitrogen or
oxygen because they're very electronegative and can pull the bonding
electrons away from the hydrogen. Substances with hydrogen bonding have
higher melting and boiling points because of the extra energy needed to
break the hydrogen bonds.
◍ What is a dipole-dipole force?.
Answer: The attraction between the positive end of one polar molecule and
the negative end of another
◍ What is a london dispersion force?.
Answer: weak forces that result from temporary shifts in the density of
COMPREHENSIVE STUDY GUIDE 2026
FULL QUESTIONS AND SOLUTIONS
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
◍ Atomic number is the same as.
, Answer: number of protons
◍ Atomic mass is the same as.
Answer: Number of protons and neutrons
◍ Different types of chemical bonding.
Answer: metallic, covalent, ionic
◍ What is covalent bonding and how does it work?.
Answer: when atoms share one or more pairs of electrons. They have similar
electronegativities
◍ What is ionic bonding?.
Answer: when atoms transfer electrons. Large difference in electronegativity
◍ Examples of ionic bonds.
Answer: NaClCs2OMgONH4NO3
◍ Examples of covalent bonds.
Answer: F2, O2, N2, H2, CL2, HCL, H2O
◍ What is metallic bonding?.
Answer: the chemical bonding that results from the attraction between metal
atoms and the surrounding sea of electrons
◍ What is hydrogen bonding?.
Answer: Hydrogen bonding is the strongest intermolecular force. it only
happens when hydrogen is covalently bonded to fluorine, nitrogen or
oxygen because they're very electronegative and can pull the bonding
electrons away from the hydrogen. Substances with hydrogen bonding have
higher melting and boiling points because of the extra energy needed to
break the hydrogen bonds.
◍ What is a dipole-dipole force?.
Answer: The attraction between the positive end of one polar molecule and
the negative end of another
◍ What is a london dispersion force?.
Answer: weak forces that result from temporary shifts in the density of
