Salts of Calcium and Magnesium are responsible for hardness of water. Bicarbonates, Carbonates, Chlorides and Sulphates of Calcium and Magnesium causes temporary and permanent hardness.
Argon, with the symbol Ar which is the third noble gas, in group 18 makes up about 1% of the Earth's atmosphere, making it the most common noble gas on Earth.
If an external electrical conductor connects the copper and zinc electrodes, zinc from the zinc electrode dissolves into the solution as Zn2+ ions (oxidation), releasing electrons that enter the external conductor.
Explanation not provided, please join discuss, your contributions are welcomed
Explanation not provided, please join discuss, your contributions are welcomed
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