A substance made up of two or more types of atom chemically joined together.
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Molecule
A substance made up of at least two atoms, the same or different, that are chemically bonded.
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Proton
A sub-atomic particle with a positive charge, that is found in the nucleus.
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Neutron
A sub-atomic particle with a neutral charge, that is found in the nucleus.
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Electron
A sub-atomic particle with a negative charge, that is found in the outer shells of an atom and is smaller than a neutron or proton.
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Atomic Number
The smaller number in the periodic table, which describes the number of protons/electrons.
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Atomic Mass
The larger number in the periodic table, which describes the total number of particles in the nucleus.
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Period Number
The period number describes the number of shells in each atom, it is in rows.
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Group Number
The group number describes the number of electrons in the outer shell of the atom, it is in columns.
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Noble Gases
Noble gases are found in group 0 and are unreactive due to having full outer shells, eg.neon, argon, helium.
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Ionic Bonding
A chemical bond formed when one atom (a) gives up one or more electrons to another atom (b) in order for both atoms to gain full outer shells - making atom A have a positive charge and atom B a negative charge. A is always a metal and B a non metal.
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Covalent Bonding
The bonds formed when atoms join together by sharing electrons in order to gain a full outer shell. Only for non-metals and non-metals bonding.
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Isotopes
Atoms of the same element which have different numbers of neutrons in the nuclei, eg. Chlorine
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Other cards in this set
Card 2
Front
A substance made up of two or more types of atom chemically joined together.
Back
Compound
Card 3
Front
A substance made up of at least two atoms, the same or different, that are chemically bonded.
Back
Card 4
Front
A sub-atomic particle with a positive charge, that is found in the nucleus.
Back
Card 5
Front
A sub-atomic particle with a neutral charge, that is found in the nucleus.
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