Electronegativity.
If the difference in electronegativity for the atoms in a bond is greater than 0.4, we consider the bond polar. If the difference in electronegativity is less than 0.4, the bond is essentially nonpolar.
One of the observable changes of a chemical change is the change in color. So, yes, leaves changing color is a chemical changes. This is brought about by biochemical reactions of the plant. The plant is composed of different pigments like chlorophyll, carotenoids and anthocyanins. The dominant one is chlorophyll which gives leaves its green characteristic cholor. The chlorophyll is abundant in plants because it is responsible for the process of photosynthesis. But when the season changes to longer nights and less sunlight, the chlorophyll cannot be used. So, it spends it reserves through other pigments. Hence, it changes color. A yellow leaf has dominant caretonoid pigment.
Answer:
products or processes that solve problems.
Explanation:
Elastic stockings or also known as compression stockings are recommended after an operation in order to prevent the formation of blood clots in the leg that is operated. Usually, they are recommended when there will be difficulty in moving around after surgery.
When assessing a patient who wears them, the health professional should ensure that every part on the edge of the stockings is receiving enough circulation. The toes should be checked for signs of reduced blood flow and also the patient should be asked for any dangerous signs of numbness or tingling.