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3
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one of the group of elements with properties opposite of metals
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4
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one of a group of elements made up of gases that do not combine with other materials
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5
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one of a group of atoms of an element with the same number of protons but different number of neutrons
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6
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an element whose atoms do not react in nature with other atoms of other elements
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7
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the average mass of all the isotopes of a particular element
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9
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a group of elements with similiar properties arranged in column
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1
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a mixture of two or more metals
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2
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an arrangement of elements by increasing atomic number
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8
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one or two letters that represent the name of the element
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