How many valence electrons does tin (Sn) have?​

How many atoms are there in 5.70 mol of mg

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver