Why does the reactivity of elements increase moving from left to right on the periodic table?

a) atoms of elements more easily let go of their valence electrons
b) atoms of elements are closer to filling their valence shell with electrons
c) the valence shells of each
elements atoms get smaller

pick one

A

Explanation:

please dont delete i know im super late but i need points (answers correct tho)

C.) the valence shells of each elements atoms get smaller

Explanation:

I did the test and got it right

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.