What are canal rays ?

Channel rays or anode rays are a historical name for positive ion beams, due to their first embodiment. They were indeed observed experimentally for the first time by a German physicist, Eugen Goldstein, in 1886.

Explanation:

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.