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What is the mass number of an element that has an atomic number of 20 and 21 neutrons?
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According to the vsepr theory what is the shape of a molecule that has a central atom valence three other items with no lone pairs of electrons
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The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.
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What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves
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What is the mass number of an element that has an atomic number of 20 and 21 neutrons?...
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