As can be seen in the attached image, α-pyrone has a highly electrophilic carbon atom, since it is attached to two oxygen atoms that are electronegative and subtract electrical charge from the carbon, leaving it with a <u>positive partial charge</u>. By virtue of the above, <u>the bromine atoms, which have an important electron density that makes them good nucleophiles, will be attracted to the aforementioned carbon due to their positive charge</u>, thus favoring the substitution product to a greater extent than that of addition.
Rutherford is the man responsible :)
<span>crushing a can
</span><span>chopping wood
</span>shredding paper
<span>It is important to test only one variable when conducting an experiment because that one variable will only have one change. You want to know whether or not that one change is what caused the outcome of the experiment. If you use too many you don't know what really caused the outcome.</span>
The answer is; water
Water from precipitation is the main agent of erosion. The water forms surface runoffs on the earth surface carrying with it soil to the oceans. This water also curves the earth surface by eroding and curving rocks over time to form rivers. It is this water that also dissolved limestone rocks to form geographical features such as caves. Another example is how water from the oceans erodes beaches to form features such as cliffs.
