When ammonium chloride is dissolved in water, the beaker gets cold. Which type of reaction does this describe O exothermic
O endothermic
O both exothermic and endothermic
O neither exothermic nor endothermic

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.

Many pharmaceutical drugs are organic compounds that were originally synthesized in the laboratory. which two scientific disciplines are bridged by pharmaceutical drugs? chemistry and forensics chemistry and medicine biology and forensics biology and criminology