A LEVEL CHEMISTRY A: PERIODIC TABLE,
ELEMENTS AND PHYSICAL CHEMISTRY
COMPREHENSIVE STUDY GUIDE 2026 FULL
QUESTIONS AND SOLUTIONS GRADED A+
◍ Chemical periodicity.
Answer: The variation in properties of elements with their positions in the
periodic table
◍ Periods in the periodic table.
Answer: Periods:Rows which run horizontally.Labeled with a number: 1, 2,
3, 4, 5, 6, 7.These numbers indicate the total number of energy levels that
any element in this period will have.For example, K (potassium) which is
found in period 4, has 4 energy levels when diagrammed.
◍ element.
Answer: substance that CANNOT be chemically broken down into simpler
substances
◍ Ionization energy.
Answer: the amount of energy required to remove an electron from an atom
◍ How do the chemical characteristics of the elements in a period change as
you move from left to right across the periodic table?.
Answer: the physical and chemical properties of the elements in that period
get increasingly opposite.
◍ atom.
Answer: smallest part of an element that can be identified as that element
◍ the properties of the elements are periodic functions....
Answer: of their atomic mass.
, ◍ nucleus.
Answer: center, or core, of an atom (where the protons and neutrons are
located)
◍ The mole.
Answer: SI unit for the amount of substance present, 1 mole is 6.02 X 10 to
the 23 particles (Avogadro's number), also the link between the number of
atoms in a substance and its mass in grams (# of atoms/grams)
◍ Stoichiometry.
Answer: The relation between the quantities of substances that take part in a
reaction or form a compound (typically a ratio of whole integers)
◍ Gram atomic mass.
Answer: atomic mass of an element expressed in grams
◍ Chemical formulas.
Answer: Tells what elements make up a compound and the ratios of the
atoms of those elements. The @ symbol indicates an atom or molecule
trapped inside a cage but not chemically bound to it The formula (CH3)3CH
implies a central carbon atom attached to one hydrogen atom and three CH3
groups
◍ Systematic nomenclature.
Answer: A system for naming inorganic binary compounds that uses the
names of two elements/ions in a compound with prefixes to indicate how
many atoms/ions are contributed to each molecule or formula unit
◍ proton.
Answer: particle that has a positive charge - located in the nucleus of an
atom. You can figure out the number of protons by looking at the atomic
number of an element.
◍ neutron.
Answer: particle that has no charge - located in the nucleus of an atom. You
can figure out the number of neutrons by SUBTRACTING the atomic Mass
ELEMENTS AND PHYSICAL CHEMISTRY
COMPREHENSIVE STUDY GUIDE 2026 FULL
QUESTIONS AND SOLUTIONS GRADED A+
◍ Chemical periodicity.
Answer: The variation in properties of elements with their positions in the
periodic table
◍ Periods in the periodic table.
Answer: Periods:Rows which run horizontally.Labeled with a number: 1, 2,
3, 4, 5, 6, 7.These numbers indicate the total number of energy levels that
any element in this period will have.For example, K (potassium) which is
found in period 4, has 4 energy levels when diagrammed.
◍ element.
Answer: substance that CANNOT be chemically broken down into simpler
substances
◍ Ionization energy.
Answer: the amount of energy required to remove an electron from an atom
◍ How do the chemical characteristics of the elements in a period change as
you move from left to right across the periodic table?.
Answer: the physical and chemical properties of the elements in that period
get increasingly opposite.
◍ atom.
Answer: smallest part of an element that can be identified as that element
◍ the properties of the elements are periodic functions....
Answer: of their atomic mass.
, ◍ nucleus.
Answer: center, or core, of an atom (where the protons and neutrons are
located)
◍ The mole.
Answer: SI unit for the amount of substance present, 1 mole is 6.02 X 10 to
the 23 particles (Avogadro's number), also the link between the number of
atoms in a substance and its mass in grams (# of atoms/grams)
◍ Stoichiometry.
Answer: The relation between the quantities of substances that take part in a
reaction or form a compound (typically a ratio of whole integers)
◍ Gram atomic mass.
Answer: atomic mass of an element expressed in grams
◍ Chemical formulas.
Answer: Tells what elements make up a compound and the ratios of the
atoms of those elements. The @ symbol indicates an atom or molecule
trapped inside a cage but not chemically bound to it The formula (CH3)3CH
implies a central carbon atom attached to one hydrogen atom and three CH3
groups
◍ Systematic nomenclature.
Answer: A system for naming inorganic binary compounds that uses the
names of two elements/ions in a compound with prefixes to indicate how
many atoms/ions are contributed to each molecule or formula unit
◍ proton.
Answer: particle that has a positive charge - located in the nucleus of an
atom. You can figure out the number of protons by looking at the atomic
number of an element.
◍ neutron.
Answer: particle that has no charge - located in the nucleus of an atom. You
can figure out the number of neutrons by SUBTRACTING the atomic Mass
