Which symbol represents atoms that are isotopes of an element? a. C-14 and N-14

b. O-16 and O-18

c. I-131 and I-131

d. Rn-222 and Ra-222

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point

What is the next step in muscle contraction after the actin changes shape

Acarotenoid is a yellow-orange pigment that absorbs light. infrared blue-green yellow-orange ultraviolet