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| The physical and chemical properties of the elements are periodic functions of their atomic numbers. |
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| 58-71 (Atomic Number) Elements |
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| 90-103 (Atomic Number) Elements |
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| Group 1 Elements; Highly Reactive, silvery appearance and are soft enough to cut through with a knife. |
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| Group 2 Elements; Highly reactive, yet less reactive than group 1, harder, denser, stronger, and higher melting points. |
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| d-block elements are metals with typical metallic properties and are often referred to as transition elements. |
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| P and S-Block elements together. |
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| Most reactive non-metals in Group 17 |
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Term
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Definition
| 1/2 Distance between the nuclei of identical atoms that are bonded together. |
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Definition
| Increase down a group (up to down), decrease across a period (left to right). |
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Definition
| Energy required to remove one electron from a neutral atom of an element. |
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Definition
| Increase across a period (left to right), decrease down a group (up to down). |
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Term
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Definition
| The energy change that occurs when an electron is acquired by a neutral atom. |
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Definition
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| The electrons available to be lost, gained, or shared in the formation of chemical compounds. |
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Definition
| Measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound. |
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Term
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Definition
| Atom or group of bonded atoms that have a positive or negative charge. |
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