P 1. Elements X and Y react to form an ionic compound a formula XY. What could be the proton (atomic) numbers of X and Y? X | Y
A | 3 | 8
B | 6 | 8
C | 8 | 16
D | 12 | 16

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.

Compare and contrast physical changes with chemical changes.

Select all of the methods through which a drug can enter your body. injection swallowing inhalation absorption