AQA Chemistry Paper 1 EXAM QUESTIONS AND CORRECT VERIFIED ANSWERS|GRADE A+
APPROVED|100% PASS
element -CORRECT ANSWER-A pure substance made of only one kind of atom
atom -CORRECT ANSWER-the smallest component of an element having the chemical
properties of the element
periodic table -CORRECT ANSWER-a table of the chemical elements arranged in order of
atomic number, usually in rows, so that elements with similar atomic structure (and hence
similar chemical properties) appear in vertical columns.
compound -CORRECT ANSWER-A substance made up of atoms of two or more different
elements joined by chemical bonds
electron -CORRECT ANSWER-A tiny, negatively charged particle that moves around the
nucleus of an atom.
nucleus -CORRECT ANSWER-A region that is located at the centre of an atom and contains
most of the atom's mass (protons and neutrons)
proton -CORRECT ANSWER-A subatomic particle that has a positive charge and that is found
in the nucleus of an atom
neutron -CORRECT ANSWER-A subatomic particle that has no charge and that is found in the
nucleus of an atom
,atomic number -CORRECT ANSWER-The number of protons in the nucleus of an atom
atomic mass -CORRECT ANSWER-The average mass of all the isotopes of an element
mixture -CORRECT ANSWER-A combination of two or more substances that are *not*
chemically combined
chemical reaction -CORRECT ANSWER-the process by which one or more substances change
to produce one or more different substances
mass -CORRECT ANSWER-A measure of the amount of matter in an object
(g) -CORRECT ANSWER-indicates that a substance in a chemical equation is a gas
(s) -CORRECT ANSWER-indicates that a substance in a chemical equation is a solid
(aq) -CORRECT ANSWER-indicates that a substance in a chemical equation is dissolved in
solution
(l) -CORRECT ANSWER-indicates that a substance in a chemical equation is a liquid
chemical formula -CORRECT ANSWER-A combination of chemical symbols and numbers to
represent a substance
chemical equation -CORRECT ANSWER-A representation of a chemical reaction that uses
symbols to show the relationship between the reactants and the products
chromatography -CORRECT ANSWER-A technique that is used to separate the components
of a mixture based on the tendency of each component to travel or be drawn across the
surface of another material.
, filtration -CORRECT ANSWER-A process that separates materials based on the size of their
particles.
distillation -CORRECT ANSWER-A process used to separate dissolved solids from a liquid,
which is boiled to produce a vapor that is then condensed into a liquid
crystallization -CORRECT ANSWER-A separation technique that produces pure solid particles
of a substance from a solution that contains the dissolved substance.
leibig condenser -CORRECT ANSWER-Glassware used to condense water vapour, that
consists of two tubes one inside the other with space between for circulation of water.
fractional distillation -CORRECT ANSWER-The separation of the components in a mixture of
liquids having different boiling points by vaporization.
John Dalton -CORRECT ANSWER-English chemist who developed the Atomic theory of
matter through an experiment of gases. His theory states: A) All elements are composed of
atoms and atoms can't be divided or destroyed. B) Atoms of the same element are exactly
alike. C) Atoms of different elements are different from each other. D) The atoms of 2 or
more elements can join together to form types of matter called compounds.
J. J. Thompson -CORRECT ANSWER-Proposed the "plum pudding" model of the atom, with
electrons as negative particles embedded in a positive cloud.
plum-pudding model -CORRECT ANSWER-negatively charged electrons were small particles
held within a positively charged sphere, proposed by Thompson
Ernest Rutherford -CORRECT ANSWER-British physicist (born in New Zealand) who
discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)
APPROVED|100% PASS
element -CORRECT ANSWER-A pure substance made of only one kind of atom
atom -CORRECT ANSWER-the smallest component of an element having the chemical
properties of the element
periodic table -CORRECT ANSWER-a table of the chemical elements arranged in order of
atomic number, usually in rows, so that elements with similar atomic structure (and hence
similar chemical properties) appear in vertical columns.
compound -CORRECT ANSWER-A substance made up of atoms of two or more different
elements joined by chemical bonds
electron -CORRECT ANSWER-A tiny, negatively charged particle that moves around the
nucleus of an atom.
nucleus -CORRECT ANSWER-A region that is located at the centre of an atom and contains
most of the atom's mass (protons and neutrons)
proton -CORRECT ANSWER-A subatomic particle that has a positive charge and that is found
in the nucleus of an atom
neutron -CORRECT ANSWER-A subatomic particle that has no charge and that is found in the
nucleus of an atom
,atomic number -CORRECT ANSWER-The number of protons in the nucleus of an atom
atomic mass -CORRECT ANSWER-The average mass of all the isotopes of an element
mixture -CORRECT ANSWER-A combination of two or more substances that are *not*
chemically combined
chemical reaction -CORRECT ANSWER-the process by which one or more substances change
to produce one or more different substances
mass -CORRECT ANSWER-A measure of the amount of matter in an object
(g) -CORRECT ANSWER-indicates that a substance in a chemical equation is a gas
(s) -CORRECT ANSWER-indicates that a substance in a chemical equation is a solid
(aq) -CORRECT ANSWER-indicates that a substance in a chemical equation is dissolved in
solution
(l) -CORRECT ANSWER-indicates that a substance in a chemical equation is a liquid
chemical formula -CORRECT ANSWER-A combination of chemical symbols and numbers to
represent a substance
chemical equation -CORRECT ANSWER-A representation of a chemical reaction that uses
symbols to show the relationship between the reactants and the products
chromatography -CORRECT ANSWER-A technique that is used to separate the components
of a mixture based on the tendency of each component to travel or be drawn across the
surface of another material.
, filtration -CORRECT ANSWER-A process that separates materials based on the size of their
particles.
distillation -CORRECT ANSWER-A process used to separate dissolved solids from a liquid,
which is boiled to produce a vapor that is then condensed into a liquid
crystallization -CORRECT ANSWER-A separation technique that produces pure solid particles
of a substance from a solution that contains the dissolved substance.
leibig condenser -CORRECT ANSWER-Glassware used to condense water vapour, that
consists of two tubes one inside the other with space between for circulation of water.
fractional distillation -CORRECT ANSWER-The separation of the components in a mixture of
liquids having different boiling points by vaporization.
John Dalton -CORRECT ANSWER-English chemist who developed the Atomic theory of
matter through an experiment of gases. His theory states: A) All elements are composed of
atoms and atoms can't be divided or destroyed. B) Atoms of the same element are exactly
alike. C) Atoms of different elements are different from each other. D) The atoms of 2 or
more elements can join together to form types of matter called compounds.
J. J. Thompson -CORRECT ANSWER-Proposed the "plum pudding" model of the atom, with
electrons as negative particles embedded in a positive cloud.
plum-pudding model -CORRECT ANSWER-negatively charged electrons were small particles
held within a positively charged sphere, proposed by Thompson
Ernest Rutherford -CORRECT ANSWER-British physicist (born in New Zealand) who
discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)
