Chemistry, 13.12.2020 16:20 amyeaglin2003
1, The number of elements that have been discovered since 1871.
2. Four pairs of elements in the periodic table where the atomic masses are in the opposite order to the atomic numbers.
3. Ten elements that were named after planets and other heavenly bodies in the universe
4.Ten elements that were discovered and used by people as early as 2000 years ago.
Answers: 3
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Helium decays to form lithium. which equation correctly describes this decay?
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What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.
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1, The number of elements that have been discovered since 1871.
2. Four pairs of elements in the pe...
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