Answer correct answer and you get brainliest!! Provide a rational for this general trend based on energy level from which the electron is removed from the atom (i. e., the valence electron configuration of the atom).

(It's talking about period trends)

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock