tổng số hạt cơ bản của x là 82 , số hạt mang điện nhìu hơn số hạt mang điện tích âm là 4 . số khối của là bao nhiu

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles

Which element is least likely to undergo a chemical reaction

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound