What would the Lewis dot Structure for CH2N2H2 look like?

How have the greenhouse gasses increased from the year 2000 to 2018

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

Which of these features are formed when hot groundwater is forced out through cracks in the earth's surface?