Which statement is part of Dalton atomic theory? A. Atoms are composed of protons neutrons and electrons B. Elements can have atoms that are isotopes
C. one type of atomcannot be changed to another type by a chemical reaction
D. Electrons move around the nucleus in an electron cloud

What is impossible to do with a hypothesis

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature