If you saw two populations of a species of snail, separated by a water-filled valley that they could not cross, you might eventually expect to see speciation due to

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this

the answer is c. it will give up it's valence electron to the other atom.