When looking at an illustration of the seasons the dark portion of the earth represents what?

Which of the following is most likely true about water in chemical solutions?

How many grams of phosphorus are contained in 5.09 moles of phosphorus?

With the largest atoms and the smallest number of valence electrons and with the smallest atoms and the greatest number of valence electrons are the most reactive. a. nonmetals; metals b. nonmetals; transition elements c. transition elements; metals d. metals; nonmetals