题目
谁能帮我做这两道英语科学题?.
1.explain the layout of the periodic table.includ these words:groups,periods,atomic number,metals non-metals,metalloids and noble gases.
2.plutonium has an atomic number of 94.explain why there are no naturally occurring deposits of plutonium on earth.
1.explain the layout of the periodic table.includ these words:groups,periods,atomic number,metals non-metals,metalloids and noble gases.
2.plutonium has an atomic number of 94.explain why there are no naturally occurring deposits of plutonium on earth.
提问时间：2021-03-28
答案
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 th...
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