Term
| The modern periodic table contains ______ ________ or rows of elements and ________ _________ or columns of elements. |
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Definition
| seven periods, eighteen groups |
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Term
| Element ______ are abbreviations usually based on the elements name. |
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Definition
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Term
| The box on the table gives the _______ ________ and _______ ________ for each element. |
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Definition
| atomic number, atomic mass |
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Term
| Groups 1&2 are ______ _______ found in nature combined with other elements |
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Definition
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Term
| _______ is placed in group 1; how ever it is a ___________. |
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Definition
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Term
| Group 13-18 may contain _________,_______, or ________ in solid, liquid, or gass form. |
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Definition
| metals, metalloids, or non-metals |
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Term
| ________ is found in all living things and exists in several forms |
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Definition
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Term
| The ______ _________ contains nitrogen and phosphorus, which are required |
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Definition
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