How to calculate no of electrons in a molecule
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No. of neutrons / No. of protons.
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Multiply the element's atomic number by the number of atoms of this type (see Step 1) in the molecule. Repeat for all elements in the molecule, then add up all the products to calculate the number of electrons. example, the number of electrons in KNO3 equals (19 x 1) + (7 x 1) + (8 x 3) = 50.
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