From the Book Water: The epic struggle for wealth, power and Civilization (Chapter 2)... Explain why the three points you posted on the forum are the three most important points from the book. If you have since
changed your mind, explain which points ARE the three most important. THEN, address why each of the points listed by other
students is not as important as yours. Please cite your work. You can use the textbook, the videos, or any other source to
cover this. This question is worth 20 of the 100 pts on this test.
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uranium-238 i believe is your answer

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.