(chemistry) a process in which one substance permeates another
2
(chemistry) the ratio of the total mass of an element in the earth's crust to the total mass of the earth's crust
3
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
4
(chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated n
5
n any specific behavior n the state of being active n an organic process that takes place in the body n (chemistry) the capacity of a substance to take part in a chemical reaction n a process existing in or produced by nature (rather than by the intent of human beings) n the trait of being active
