The discovery of mid ocean ridges support the hypothesis of continental drift as well as explain some of the processes that occur beneath earths surface . where does the material involved in a sea-floor spreading come from?

Which element in the third period would you expect to have the larger atomic radius, sodium (na) or sulfur (s)? a. sodium, because it has a higher effective nuclear charge attracting electrons in fewer energy levels. b. sodium, because it has fewer protons attracting electrons in the same energy levels. c. sulfur, because it has more protons attracting electrons in more energy levels. d. sulfur, because it has a higher effective nuclear charge attracting electrons in the same energy levels.

Determine the reaction and balance the following equations urgent due in the morning

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?