SEMMELWEIS ENTRANCE EXAM
CHEMISTRY FINAL SCRIPT COMPLETE
QUESTIONS AND CORRECT ANSWERS
VERIFIED PASS
●● 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
●● What are the periodic properties?.
Answer:
●● Element (on periodic table).
Answer:
●● 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: NaCl
Cs2O
MgO
NH4NO3
●● 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.
CHEMISTRY FINAL SCRIPT COMPLETE
QUESTIONS AND CORRECT ANSWERS
VERIFIED PASS
●● 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
●● What are the periodic properties?.
Answer:
●● Element (on periodic table).
Answer:
●● 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: NaCl
Cs2O
MgO
NH4NO3
●● 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.
