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Card 6
Front
Relatively heavy central part of an atom, made up of protons and neutrons.
Back
Card 7
Front
Subatomic particle found in the nucleus of an atom. It has a charge of +1 and a relative mass of 1.
Back
Card 8
Front
Subatomic particle found in the nucleus of an atom. It has no charge and a relative mass of 1.
Back
Card 9
Front
Number of protons in the nucleus of an atom.
Back
Card 10
Front
Table in which the elements are arranged in rows (periods) and columns (groups) in order of their atomic number
Back
Card 11
Front
Total number of protons and neutrons in the nucleus of an atom.
Back
Card 12
Front
Atoms of the same element that have different numbers of neutrons in their nuclei are called isotopes.
Back
Card 13
Front
Letter or pair of letters used to represent on atom of an element, eg H represents one atom of hydrogen; Fe represents one atom of iron.
Back
Card 14
Front
Substance made up of two or more different elements, chemically combined.
Back
Card 15
Front
Region of space in an atom that can hold a number of electrons.
Back
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