What are three ionic compounds found in your phone

sodium chloride: NaCl, with Na+ and Cl- ions.

lithium nitride: Li3N, with Li+ and N3- ions.

magnesium oxide: MgO, with Mg2+ and O2- ions.

calcium phosphide: Ca3P2, with Ca2+ and P3- ions.

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the oldest known insects are believed to live around 400 millions ago as suggested by the fossil records.   some plants having woody stems also evolved during this time.

after the evolution of insects the first four legged species or the tetrapods evolved in shallow freshwater habitats from the intermediate species approximately 397 million years ago. the tetrapods went on conquering the land giving rise to amphibians, reptiles, mammals and birds.

the major split in tetrapods first occurred 340 million years ago branching off from amphibians.

363 million years ago when the carboniferous period began the insects started roaming on land and taking flights, following which the four limbed tetrapods adapted in the terrestrial habitat.

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