A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristic of calcium is most closely related to its chemical reactivity? A The 20 protons in each atom of calcium B The density of calcium, which is 1.54 g/cm3
C The atomic mass of calcium, which is 40.078 amu D The 2 valence electrons in each atom of calcium

d

Explanation:

I took the quiz and I got that question right :)

answer: the correct answer id option(d).

explanation:

snell's law refraction:

the angle of refraction =

the angle of incidence =

refractive index of air = = 1

refractive index of glycerol = 1.47

from the given options, the most closest answer to 63.72° is 65° of option (d).

what is the question because that is not a question.