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.arranged elements by increasing atomic mass
.predicted properties of missing elements |
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.discovered that each element has a unique atomic number
.arranged elements by atomic mass number
.now all elements fit into place based on properties |
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| properties of elements repeat when elements are arranged by increasing atomic number |
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| what happens to the number of the energy level as you begin each new row? |
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| what is the similar characteristic in each column? |
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| same number of valence electrons |
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| elements in the same column have similar ________? |
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| elements in the same column have the same number of ___________? |
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| elements in the same column have similar ________ properties? |
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| Noble gases have _______ outer ________? |
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| Noble gases have how many valence electrons? |
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1.rows on periodic table
2.columns on the periodic table |
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| in columns 1-2 and 13-18 the number in the ones place tells what? |
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| number of valence electrons |
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| metalloids have properties of ______ and _____? |
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| metalloids border ________? except Al which is a _____? |
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