Chemistry, 20.08.2019 08:30 cristalcastro901
As the elements in group 17 on the periodic table are considered from top to bottom, what happens to the atomic radius and the metallic character of each successive element?
(1) the atomic radius and the metallic character both increase.
(2) the atomic radius increases and the metallic character decreases.
(3) the atomic radius decreases and the metallic character increases.
(4) the atomic radius and the metallic character both decrease.
Answers: 1
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In the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom?
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Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.
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As the elements in group 17 on the periodic table are considered from top to bottom, what happens to...
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