谁能帮我做这两道英语科学题?.
问题描述：
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.
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 th...