GCSE Chemistry (AQA) Questions with Detailed Verified Answers

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*GCSE Chemistry (AQA) Questions
with Detailed Verified Answers

Question: element
Answer: A pure substance made of only one kind of atom


Question:atom
Answer: the smallest component of an element having the chemical
properties of the element


Question:periodic table
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.


Question:compound
Answer: A substance made up of atoms of two or more different elements
joined by chemical bonds


Question:electron
Answer: A tiny, negatively charged particle that moves around the nucleus of
an atom.


Question:nucleus

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Answer: A region that is located at the centre of an atom and contains most
of the atom's mass (protons and neutrons)


Question:proton
Answer: A subatomic particle that has a positive charge and that is found in
the nucleus of an atom


Question:neutron
Answer: A subatomic particle that has no charge and that is found in the
nucleus of an atom


Question:atomic number
Answer: The number of protons in the nucleus of an atom


Question:atomic mass
Answer: The average mass of all the isotopes of an element


Question:mixture
Answer: A combination of two or more substances that are *not* chemically
combined


Question:chemical reaction
Answer: the process by which one or more substances change to produce one
or more different substances


Question:mass
Answer: A measure of the amount of matter in an object

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Question:(g)
Answer: indicates that a substance in a chemical equation is a gas


Question:(s)
Answer: indicates that a substance in a chemical equation is a solid


Question:(aq)
Answer: indicates that a substance in a chemical equation is dissolved in
solution


Question:(l)
Answer: indicates that a substance in a chemical equation is a liquid


Question:chemical formula
Answer: A combination of chemical symbols and numbers to represent a
substance


Question:chemical equation
Answer: A representation of a chemical reaction that uses symbols to show
the relationship between the reactants and the products


Question:chromatography
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.

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Question:filtration
Answer: A process that separates materials based on the size of their
particles.


Question:distillation
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


Question:crystallization
Answer: A separation technique that produces pure solid particles of a
substance from a solution that contains the dissolved substance.


Question:leibig condenser
Answer: Glassware used to condense water vapour, that consists of two tubes
one inside the other with space between for circulation of water.


Question:fractional distillation
Answer: The separation of the components in a mixture of liquids having
different boiling points by vaporization.


Question:John Dalton
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.