Antoine Henri Becquerel was a French physicist who did a lot of work with fluorescent minerals. While conducting some experiments with minerals containing uranium, he discovered , but he did not know it at the time.

radioactivity

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explanation:

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the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.