谁能帮我做这两道英语科学题?.1.explain the layout of the periodic table.in
1个回答
1 :the periodic table are seperated into periods,there are 4 groups metals,non-metals,metalloids and noble gases.each group's elements all have atomic number which is the number of protons found in the nucleus of an atom.
2:Plutonium is not formed by the death of a star in a super nova like uranium is.Uranium is the heaviest element formed in that event.That's why there isn't any plutonium around as an ore.Just the trace amounts found with uranium.
相关问题
