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Element R and Element Q have the same number of valence electrons. These elements have similar chemical behavior, but element R has fewer energy levels than element Q Describe what their positions on the Periodic Table have in common.
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How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.
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What if it is did darwin used to support his theory of evolution
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Element R and Element Q have the same number of valence electrons. These elements have similar chemi...
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