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SOLVED: (a) Dalton used symbol "O" for oxygen and "H" for hydrogen.(b) Symbol represents an atom of an element.(c) Symbolic expression for a molecule is called a chemical formula.(d) Sodium chloride has two radicals, Sodium is a positive radical while chloride is a negative radical.(e) Valency of phosphorus in PCI3 is 3 and in PCI5 is 5.(f) Valency of Iron in FeCl2 is 2 and in FeCl3 it is 3.(g) Formula of iron (III) carbonate is Fe2(CO3)3.

SOLVED: (a) Dalton used symbol "O" for oxygen and "H" for hydrogen.(b) Symbol represents an atom of an element.(c) Symbolic expression for a molecule is called a chemical formula.(d) Sodium chloride has two radicals, Sodium is a positive radical while chloride is a negative radical.(e) Valency of phosphorus in PCI3 is 3 and in PCI5 is 5.(f) Valency of Iron in FeCl2 is 2 and in FeCl3 it is 3.(g) Formula of iron (III) carbonate is Fe2(CO3)3.

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9 give the isotope symbol and number of neutrons in one atom of the following elements show your calculations barium 138 carbon 12 sulfur 32 hydrogen magnesium 24 mercury 202 fluorine 19 99052

9 give the isotope symbol and number of neutrons in one atom of the following elements show your calculations barium 138 carbon 12 sulfur 32 hydrogen magnesium 24 mercury 202 fluorine 19 99052

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