Which element has the lowest first ionization energy?
Be
Sr
OCa
Mg

Asample of ammonia reacts with oxygen as shown. 4nh3(g) + 5o2(g) 4no(g) + 6h2o(g) what is the limiting reactant if 4.0 g of nh3 react with 8.0 g of oxygen? o2 because it produces only 0.20 mol of no. nh3 because it produces only 0.20 mol of no. o2 because it produces two times less no than nh3. nh3 because it produces three times more no than o2.

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which organism develops breathing organism develops breathing organs from pharyngeal arches? shark, spider, sea star, sea horse