Its for science assignmennt assignment: calorie counting and expenditure exploration calculation you need to make – example: (17.5 x body weight) + 651

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.