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22 Cards in this Set
- Front
- Back
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Electrons |
Negatively charged particle that orbits the nucleus of an atom |
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Neutron |
A neutrally charged particle found within the nucleus |
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Proton |
A positively charged particle found within the nucleus |
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Valence shell |
The outer shell of an atom |
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Atom |
An atom is the smallest particle you can get and can't split it. It's formed of protons, neutrons and electrons |
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Nucleus |
The centre of an atom. Composed of neutrons and protons, and possessing most of the mass |
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Atomic number |
The number of protons in the nucleus of an atom. It determines the chemical properties of an element and it's place in the periodic table |
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Mass number |
The total number of protons and neutrons in the nucleus. |
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Element |
A class of substances that cannot be separated into simpler substances by chemical means |
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Compound |
A substance composed of two or more elements |
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Ion |
An electrically charged atom, or group of atoms, formed by the loss or gain of one or more electrons |
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Cation |
A positively charged atom, or group of atoms, caused by an atom or group of atoms losing one or more electrons |
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Anion |
A negatively charged atom, or group of atoms, caused by an atom or group of atoms gaining one or more electrons |
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Monatomic ion |
An ion consisting one atom |
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Polyatomic ion |
An ion consisting of two or more atoms |
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Chemical formula |
Letters used to represent the individual elements in a compound |
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Reactant |
A substance that takes part in, and undergoes change during a reaction |
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Product |
A substance produced by a chemical reaction |
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Word equation |
An equation in which words are used to show both the reactant and the products of a chemical equation |
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Chemical equation |
An equation in which chemical formulae are used to show both the reactants and products of a chemical reaction |
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Group |
Vertical column in the periodic table |
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Period |
Horizontal row in the periodic table |
