Chemical reactions and nuclear reactions cause matter to change in different ways. Which two statements describe how matter changes only in a nuclear reaction? PLZZZ HELP ME ASAP!! A.) Each atomic nucleus changes
B.) The electrons of atoms are rearranged
C.) No new elements are formed
D.) Atoms of new elements are formed

Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?