The first inert gas to be isolated was argon, in 1894. Argon was found to have an atomic weight of slightly less than 40. Which of the following proposed changes to Mendeleev's original periodic table were supported by the properties of argon.
I. Calcium should no longer be considered one of the alkaline earth metals
II. Another group of elements should be added to the periodic table.
III. The peridocity of elements should depend atomic number rather than atomic weight.
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Chemistry, 22.06.2019 09:00
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Chemistry, 22.06.2019 16:50
Answer asap need by wednesday morning calculate the ph of 0.16m ch3cooh which has ka = 1.74 x 10-5 mol dm-3 best answer will be brainliest
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Chemistry, 23.06.2019 05:10
Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!
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The first inert gas to be isolated was argon, in 1894. Argon was found to have an atomic weight of s...
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