! 1. the isotope sodium-20 has how many protons? 11 na 22.99 sodium a) 9 b) 10 c) 11 d) 12 2. the isotope sodium-20 has how many neutrons? 11 na 22.99 sodium a) 9 b) 10 c) 11 d) 12

Which atom or ion is the largest? a. k b. k+ c. ca d. ca2+ e. li

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

Connect the whole numbers on the periodic table to indicate what they represent?