SEMMELWEIS ENTRANCE CHEMISTRY
EXAM QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED 2026
UPDATE!!
The mole concept -CORRECTANSWER A method that allows the relative number of
reactant particles involved in a chemical reaction to be known
Avogadro's number -CORRECTANSWER number of representative particles in a mole,
6.02 X 10^23
Basic structures of atoms -CORRECTANSWER There is a nucleus in the center
surrounded by an electron cloud or field
Quantum numbers -CORRECTANSWER 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 -CORRECTANSWER Water (H2O), table salt (NaCL); carbon
dioxide (CO2); baking soda (NaHCO3); carbon monoxide (CO); sand or glass (SiO2)
, Periodic properties -CORRECTANSWER chemical or physical properties that vary
among elements according to trends that repeat as atomic number increases
What are the periodic properties? -CORRECTANSWER
Element (on periodic table) -CORRECTANSWER
Atomic number is the same as -CORRECTANSWER number of protons
Atomic mass is the same as -CORRECTANSWER Number of protons and neutrons
Different types of chemical bonding -CORRECTANSWER metallic, covalent, ionic
What is covalent bonding and how does it work? -CORRECTANSWER when atoms
share one or more pairs of electrons. They have similar electronegativities
What is ionic bonding? -CORRECTANSWER when atoms transfer electrons. Large
difference in electronegativity
Examples of ionic bonds -CORRECTANSWER NaCl
Cs2O
MgO
NH4NO3
EXAM QUESTIONS AND CORRECT
ANSWERS 100% VERIFIED 2026
UPDATE!!
The mole concept -CORRECTANSWER A method that allows the relative number of
reactant particles involved in a chemical reaction to be known
Avogadro's number -CORRECTANSWER number of representative particles in a mole,
6.02 X 10^23
Basic structures of atoms -CORRECTANSWER There is a nucleus in the center
surrounded by an electron cloud or field
Quantum numbers -CORRECTANSWER 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 -CORRECTANSWER Water (H2O), table salt (NaCL); carbon
dioxide (CO2); baking soda (NaHCO3); carbon monoxide (CO); sand or glass (SiO2)
, Periodic properties -CORRECTANSWER chemical or physical properties that vary
among elements according to trends that repeat as atomic number increases
What are the periodic properties? -CORRECTANSWER
Element (on periodic table) -CORRECTANSWER
Atomic number is the same as -CORRECTANSWER number of protons
Atomic mass is the same as -CORRECTANSWER Number of protons and neutrons
Different types of chemical bonding -CORRECTANSWER metallic, covalent, ionic
What is covalent bonding and how does it work? -CORRECTANSWER when atoms
share one or more pairs of electrons. They have similar electronegativities
What is ionic bonding? -CORRECTANSWER when atoms transfer electrons. Large
difference in electronegativity
Examples of ionic bonds -CORRECTANSWER NaCl
Cs2O
MgO
NH4NO3
