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Which of the following is not an element? Rock Calcium Hydrogen Silicon Elements are pure substances. True or False True False about 2% about 28% about 8% about 36% What percentage ofthe crust do "Al" and "Si" make up? a pure substance made of two or more elements chemically bonded located on the periodic table not found on earth Which statement shouldbe listed under compounds? a pure substance made of two or more elements chemically bonded located on the periodic table both A and C Which statement shouldbe listed under elements? Pure substances made of two or more elements chemically bonded necessary for life made of only one type of atom Which statement shouldbe listed in themiddle? |