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Chemistry, 20.02.2021 09:30 bcifuentes

(Quickly please) Sapphires and rubies are forms of the mineral corundrum. corundrum is one of the heardest known natural mayerials. the hardness of ionic compounds depends on the structure of the crystal and the strength of the ionic bonds. yhe distance between the aluminum ions and oxide ions is 191 pm. use coulombs law to explain how the bonding in influences its properties.

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(Quickly please) Sapphires and rubies are forms of the mineral corundrum. corundrum is one of the he...

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