Why doesnt oxygen have a subscript in the formula H2O?
The formula H2O indicates that there are two atoms of hydrogen for every atom of oxygen in a molecule of water. You could write it H2O1 but that would be redundant.
In a chemical formula, a subscript is a number written to the right and slightly below the symbol for the chemical element. If the subscript is 1, it is not written. The subscripts for the chemical formula for water, H2O, are 2 for hydrogen and 1 for oxygen. The subscripts for the chemical formula for glucose, C6H12O6, are 6 for carbon, 12 for hydrogen, and 6 for oxygen.
15. For each atomic symbol in a formula like this one without an parentheses, multiply the coefficient but the subscript immediately following each atomic symbol in the formula. When there is no explicit subscript, 1 is assumed. Therefore 5 H2O contains 10 hydrogen atoms and 5 oxygen atoms, giving a total of 15.
H2O means two atoms of hydrogen combine with one atom of oxygen to make one molecule of water. The H stands for hydrogen and the subscript 2 of the H indicates that there are two atoms of hydrogen. The O is the symbol for an oxygen atom. This means that 2 hydrogen atoms and one oxygen atom bond, or join together, to form water The chemical formula H2O is the formula of water.
Because symbols for the elements do not have subscripts. A subscript is added in the chemical formula of a compound to indicate how many atoms of the element are included in a molecule of the compound. For example, when hydrogen (H) and oxygen (O) combine to form water (H2O), a subscript 2 is added to the H to indicate there are two hydrogen atoms in a molecule of water, but no subscript is added to…
The subscript tells you how many atoms of a certain element are in the representative particle of that substance. For example, H2O means 2 hydrogens and 1 oxygen. (The absence of a subscript means there's just 1.) The subscript only applies to the element immediately before it, unless the subscript occurs outside a set of parentheses, in which case it applies to everything inside the parentheses.