Chemical changes can affect physical and chemical properties, whereas physical changes can a. chemical properties b. physical properties c. both chemical, and physical properties d. none of the above

Consider the nuclear equation below. 239 > x + 4 he 94 2 what is x? 1.235 cm 96 2.243 u 92 3.235 u 92 4.243 cm 96

Which of the following statements is false regarding aromaticity? a. the compound must be cyclic b. the compound must be fully conjugated c. the compound must be planar d.the number of electrons in the pi system must satisfy the hückel 4n+2 rule e. the compound must have a neutral charge

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.