AQA GCSE Chemistry
Paper 1 2026 |
Comprehensive Revision
Guide, Practice Questions,
Answers & Required
Practicals | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,What is an atom? Smallest part of an element that can exist
What is an element? A substance made up of one type of atom
How are elements represented? Using symbols, in the periodic table
Approximately how many elements are there? 100
What is a compound? A substance made up of two or more elements chemically combined in fixed
proportions
How are the elements in a compound separated? By chemical reaction
How are chemical reactions represented? By word or symbol equations
Which group of the periodic table includes sodium and Group 1, alkali metals
potassium?
Which group of the periodic table includes chlorine, Group 7, halogens
bromine and iodine?
Which group of the periodic table includes helium, neon Group 0, noble gases
and argon?
What information does a chemical formula provide? Which elements are bonded together, and how many atoms of each are present
What is a mixture? Two or more elements or compounds not chemically bonded together
Which separation technique is used to separate a mixture Distillation
of two liquids?
Which separation technique is used to separate a mixture Fractional distillation
of more than two liquids?
Which separation technique is used to separate an Filtration
insoluble solid and a liquid?
, Which separation technique is used to separate a mixture Chromatography
of coloured substances?
Which separation technique is used to separate a soluble Crystallisation
solid from its solution?
Before the discovery of the electron what were atoms Tiny spheres that could not be divided
thought to be?
What is the 'plum pudding' model of the atom? Ball of positive charge with negative electrons embedded in it
What experiment led to the development of the nuclear Rutherford's alpha particle scattering experiment
model?
What happened to the alpha particles fired at thin gold foil Most alpha particles went straight through, but a few were scattered
in Rutherford's scattering experiment?
What is the 'nuclear' model of the atom that Rutherford Mass of the atom is in the centre (nucleus) and the nucleus was positively charged
developed that replaced the 'plum pudding' model?
Who proposed that electrons orbit the nucleus at specific Niels Bohr
distances?
What name was given to the positive particles in the Protons
nucleus?
What did James Chadwick discover? Neutrons
In what order were the subatomic particles discovered? Electron, proton, neutron
What is the relative charge on a proton? +1 (positive 1)
What is the relative charge on a neutron? 0 (no charge)
What is the relative charge on an electron? -1 (negative 1)
Why are atoms electrically neutral? Number of protons = number of electrons
Paper 1 2026 |
Comprehensive Revision
Guide, Practice Questions,
Answers & Required
Practicals | Complete
Ethics Study Guide
Updated 2026 Questions and Answers
100% Verified Exam Prep and Comprehensive
Rationales
Included
,What is an atom? Smallest part of an element that can exist
What is an element? A substance made up of one type of atom
How are elements represented? Using symbols, in the periodic table
Approximately how many elements are there? 100
What is a compound? A substance made up of two or more elements chemically combined in fixed
proportions
How are the elements in a compound separated? By chemical reaction
How are chemical reactions represented? By word or symbol equations
Which group of the periodic table includes sodium and Group 1, alkali metals
potassium?
Which group of the periodic table includes chlorine, Group 7, halogens
bromine and iodine?
Which group of the periodic table includes helium, neon Group 0, noble gases
and argon?
What information does a chemical formula provide? Which elements are bonded together, and how many atoms of each are present
What is a mixture? Two or more elements or compounds not chemically bonded together
Which separation technique is used to separate a mixture Distillation
of two liquids?
Which separation technique is used to separate a mixture Fractional distillation
of more than two liquids?
Which separation technique is used to separate an Filtration
insoluble solid and a liquid?
, Which separation technique is used to separate a mixture Chromatography
of coloured substances?
Which separation technique is used to separate a soluble Crystallisation
solid from its solution?
Before the discovery of the electron what were atoms Tiny spheres that could not be divided
thought to be?
What is the 'plum pudding' model of the atom? Ball of positive charge with negative electrons embedded in it
What experiment led to the development of the nuclear Rutherford's alpha particle scattering experiment
model?
What happened to the alpha particles fired at thin gold foil Most alpha particles went straight through, but a few were scattered
in Rutherford's scattering experiment?
What is the 'nuclear' model of the atom that Rutherford Mass of the atom is in the centre (nucleus) and the nucleus was positively charged
developed that replaced the 'plum pudding' model?
Who proposed that electrons orbit the nucleus at specific Niels Bohr
distances?
What name was given to the positive particles in the Protons
nucleus?
What did James Chadwick discover? Neutrons
In what order were the subatomic particles discovered? Electron, proton, neutron
What is the relative charge on a proton? +1 (positive 1)
What is the relative charge on a neutron? 0 (no charge)
What is the relative charge on an electron? -1 (negative 1)
Why are atoms electrically neutral? Number of protons = number of electrons
