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Yogita Ingle 5 years, 9 months ago
According to Dobereiner, all elements occurred in groups of three, when arranged in increasing order of atomic masses. He referred to these groups as triads. In a traid the elements had similar chemical properties.
Traids of the Dobereiners classification:
Traid1:
Element | Atomic mass |
Lithium (Li) | 7 |
Sodium (Na) | 23 |
Potassium (K) | 39 |
Dobereiner’s law of triads states that, the atomic mass of the middle element of a triad is the arithmetic mean of the atomic masses of the other two elements.
Example: In the triad of lithium, sodium and potassium. The atomic mass of lithium is 7 and the atomic mass of potassium is 39. The average of masses of lithium and potassium gives atomic mass of sodium 23.
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Yogita Ingle 5 years, 9 months ago
Oxidation is defined as the process of being oxidized or oxidizing. It refers to the loss of electrons in a reaction by an atom, an ion or a molecule. Oxidation occurs when the oxidation state of an atom, ion or the molecule rises up. The reduction is the process exactly opposite of oxidation wherein the electrons are gained and the oxidation state of a molecule, an atom or an ion goes low.
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