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Element = Phosphorus
elec. config = 2,8,5
Valency = 3,5
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Two plane figures are congruent if each, when superimposed on the other, covers it exactly. ... Also, if two line segments are congruent, then they have the same length. If two angles have the same measure, they are congruent. Also, if two angles are congruent, their measures are the same.
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