Which of the following is true about halogens? group of answer choices
they have seven valence electrons
they have two valence electrons
they have one valence electron
they have eight valence electrons

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

Consider this initial-rate data at a certain temperature for the reaction described by

What is the percentage of hydrogen in nitrogen trihydride