In a compound constituent elements their identity
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Molecular formulas describe the exact number and type of atoms in a single molecule of a compound. The constituent elements are represented by their chemical symbols, and the number of atoms of each element present in each molecule is shown as a subscript following that element's symbol.
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Atoms form compounds by forming either covalent or ionic bonds with atoms of other elements. A covalent bond occurs when atoms share valence electrons. For example, a water molecule ( H2O ) forms when two hydrogen atoms share their individual valence electrons with an oxygen atom.
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