The element symbol for oxygen<span> is O and its atomic number is 8. The mass numbers for oxygen must be 8 + 8 = 16; 8 + 9 = 17; 8 + 10 = 18</span>
Answer:
A.
Explanation:
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When water evaporates (which involves breaking of hydrogen bonds), it removes energy from its surroundings in a fashion that renders water an Excellent coolant.
Within water molecules, polar covalent connections are created between the hydrogen and oxygen atoms. The shared electrons are attached to the oxygen atom for a longer period of time than they are to the hydrogen atoms. A water molecule has no overall charge, but each hydrogen atom has a little positive charge, and each oxygen atom has a slight negative charge. The slightly positive hydrogen atoms repel one another and form the distinctive shape as a result of these charges. The positive and negative charges in the various regions of each water molecule cause them to attract other water molecules. Additionally, water forms hydrogen bonds with other polar molecules (like sugars) by attraction.
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Answer: Gases have the lowest density of the three, are highly compressible, and completely fill any container in which they are placed. Gases behave this way because their intermolecular forces are relatively weak, so their molecules are constantly moving independently of the other molecules present. Solids, in contrast, are relatively dense, rigid, and incompressible because their intermolecular forces are so strong that the molecules are essentially locked in place.
Explanation: