Why do you think the conservation of mass pertains more to chemical changes than physical changes?

What reaction is taking place? 02 + c3h8 = h20 + co2

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements

When a beta particle is emitted, the mass number of the nucleus a. decreases by one b. increases by one c. remains the same d. decreases by two