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Carbonic acid is a weak inorganic acid, which is also considered a solution of carbon dioxide in water. It only exists as a solution, and is also called acid of air, aerial acid, carbon dioxide solution, or dihydrogen carbonate. It is best known as a component of most aerated drinks, such as sodas and soft drinks.

Sodium peroxide is the inorganic compound with the formula Na2O2. This yellowish solid is the … source by reacting it with carbon dioxide to produce oxygen and sodium carbonate; it is thus particularly useful in scuba gear, submarines, etc.

Pauling scale is a numerical scale of electronegativities based on bond-energy calculations for different elements joined by covalent bonds. Electronegativity is the power of an atom when in a molecule to attract electrons to itself.

Radium is used in dials of clocks. Caesium is used in atomic clocks.

24k gold is also called pure gold or 100 per cent gold. (while 100% purity is unattainable, this designation is permitted in commerce for 99.95% purity)
12 karat = 50.0 % gold

This metal had been found in the sun (in the heavens) before it was found on earth, it was decided to call it by the name which means “the heavenly metal,” so they called it ” Metal of Hope.

Potassium permanganate – purification of water

Potassium Nitrate – Exlplosives production

Potassium Carbonate – Potash, used in fertilizers

Silver Iodide – Used in artificial rain

Silver Nitrate – lunar caustic, react with the compounds in human flesh so is used as a marker in elections.

Silver bromide – Used in photography

Uraninite, formerly pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2, but due to oxidation the mineral typically contains variable proportions of U3O8.

Earth’s atmosphere is 78% nitrogen, 21% oxygen, 0.9% argon, and 0.03% carbon dioxide with very small percentages of other elements.
Argon is most abundant noble gas because of its stable nucleus and inert properties.

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