Write the electron configuration of the following ions by using spdf notation: (a) Cr2 , Cr3 , Cr6 ; (b) Mo3 , Mo4 , Mo6 ; (c) Se4 , Se6 , Se2-.

Why does a cake rise when you bake it? ♡

Which element forms an ionic bond with flourine? 1) fluorine 2) carbon 3) potassium 4) oxygen

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