A formula which tells the relative number of atoms present in a compound is known as empirical formula. Examples: NaCl, HO and CH2O are the empirical formulas of sodium chloride, hydrogen peroxide and glucose respectively. Determination of Empirical Formula for Organic Compounds: To determine empirical formula percentage of each element present in a compound is…
A formula which tells the actual number of atoms present in a molecule of a substance is known as molecular formula. Examples: H2O2 and C6H12O6 are the molecular formulas of hydrogen peroxide and glucose respectively.
Many elements exist as a mixture of their isotopes. The atomic masses of such elements depend upon the number of their isotopes and their natural abundances. This is why their atomic masses are in fraction. This can be explained through following example, EXAMPLE: A sample of neon is found to consist of 20Ne, 21Ne and…
A technique which is used to find out relative abundance of isotopes with respect to their atomic masses in the form of graph, is called Mass Spectrometry. Is mass spectrometry quantitative or qualitative? Mass spectrometry is used for quantitative as well as qualitative analysis. What is a mass spectrometer used for? An instrument, which…
The relative abundance of isotopes of an element is determined by mass spectrometry. The properties of an element mostly correspond to the most abundant isotopes of that element. More than 280 isotopes are known, which occur in nature, out of which 40 are radioactive. Moreover, about 300 artificial isotopes have been produced through disintegration. Mono-isotopic…
Atoms of the same element having same atomic number but having different atomic masses are called isotopes. According to Dalton’s atomic theory, all the atoms of an element are alike in all the properties including their masses. Later on, it was discovered that atoms of the same element may be different from each other. These…