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| states that the repeating chemical and physical properties of elements change periodically with the ATOMIC NUMBER of the elements. |
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| Describes something that occurs or repeats at regular intervals |
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in chemstry, a horizontal row of elements.
(from left to right) |
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| a vertical column of elements;( from top to bottom) elements in a group SHARE chemical properties. |
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| Physical and chemical properties of elements change across each |
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| Elements in a group usually have similar |
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| Elements in the periodic table are classified as; |
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| metals, nonmetals, and metalloids |
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| Each vertical column on the periodic table is a |
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| Elements to the right of the zig-zag line are called |
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| Mendeleev arranged elements by their |
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| The elements' properties follow a pattern that repeats every |
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| A property of Alkali Metals |
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| Iodine and Chlorine are example of |
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| Chlorine and bromine are examples of |
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| Have two outer-level electrons. |
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| Compounds of carbon, are necessary for life on Earth. They contain proteins, fats and |
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| In the Boron Group, the most common element is |
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