Chemistry C1
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- Created by: chloewest5
- Created on: 07-11-19 17:10
What is an element?
A substance made up of one type of atom.
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What is an atom made up of?
A tiny central nucleus with electrons orbitting it.
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What does the coeffecient and subscript show?
The coeffecient shows the number of molecules and the subscript shows the number of atoms.
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What is the Law of Conservation?
The mass of products must equal the mass of reactants.
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What is a compound?
Atoms of two or more elements that chemically bonded.
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What is the purpose of filtration?
Separates insolouble from soluble substances.
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What does soluble mean?
A substance that dissolves.
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What does insoluble mean?
A substance that doesn't dissolve.
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What is a mixture?
When two or more elements are not chemically bonded.
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What is the purpose of distillation?
Separates different substances with different boiling points.
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What is the purpose of crystallisation?
Obtains a soluble substance from a solution.
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What is an aqueous solution?
A mixture made by adding a soluble substance to water.
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What is the atomic number?
The number of protons.
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What is biofuel?
Fuel made from animal or plant products.
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What is the process of chromatography?
Separates substances by running a solvent along a material.
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What is an electron?
A subatomic particle with a negative charge that orbits the nucleus of an atom.
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What is an elctronic structure?
The set of numbers to show the arrangement of electrons in their shells.
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What is an Ion?
A charged atom produced from the loss or gain of electrons.
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What is an isotope?
Atoms that have the same amount of protons and neutrons but different amount of neutrons.
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What is the mass number?
The total number of protons and neutrons.
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What is a neutron?
A dense sub-atomic particle with no charge.
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What is the law of conservation of mass?
When atoms cannot be created or destroyed so the mass of reactants is equal tot he mass of products.
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What is the purpose of glass beads?
It cools and condenses any liquid with the highest boiling point.
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How do you find the number of neutrons?
mass number - atomic number
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Why are all atoms neutral?
All atoms contain an equal amount of protons and electrons which means that their charges cancel out with no charge overrall.
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How do you find the number of electrons in the outer shell of an element using the Periodic Table?
The group number = the number of electrons on the outer shell
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How do you find the number of shells of an element using the Periodic Table?
The period number = the number of shells
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Which group doesn't form Ions?
Group 4
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Which groups lose electrons?
Group 1-3
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Whcih groups gain electrons?
Groups 5-6
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What was John Dalton's suggestions about the atom?
They looked like tiny hard spheres and could not be divided or split.
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What model did Thomson propose and what were his suggestions?
Atoms carry no overrall charge so the charges inside the atom must balance out; he presents the plum pudding model where there was a cloud of positive of charge and electrons embedded in it.
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What were Geiger and Marsden experiments?
They fired postively charged particles at a positively charged gold foil but instead of going through the gold foil, it scattered.
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What did Rutherford suggest?
He suggested that if Thomson's model was true, the particles would've never repelled so he thought that electrons must be orbitting the nucleus which has positively charged atoms.
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What did Bohr suggest?
He suggested that there must be electrons orbitting at a set distance.
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What theory did Chadwick prove?
There was a third sub-atomic particle called the nucleus as it explained the missing mass.
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Other cards in this set
Card 2
Front
A tiny central nucleus with electrons orbitting it.
Back
What is an atom made up of?
Card 3
Front
The coeffecient shows the number of molecules and the subscript shows the number of atoms.
Back
Card 4
Front
The mass of products must equal the mass of reactants.
Back
Card 5
Front
Atoms of two or more elements that chemically bonded.
Back
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