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Chemistry, 17.07.2019 10:30 babyleah2826
What do scandium, gallium and germanium have in common? a) they all had the properties that mendeleev had predicted when he first published his periodic table. b) all three of these elements have the same number of protons and neutrons and the same properties. c) they were all discovered by mendeleev before he published the first periodic table. d) all three of these elements have the same atomic number and atomic mass and the same properties.
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The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.
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What do scandium, gallium and germanium have in common? a) they all had the properties that mendele...
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