What is an atom called if the number of electrons is changed

Each of the following reactions is allowed to come to equilibrium and then the volume is changed as indicated. predict the effect (shift right, shift left, or no effect) of the indicated volume change. drag the appropriate items to their respective bins.co(g) + h2o(g) < => co2(g) + h2(g) (volume is decreased) pcl3(g) + cl2(g) < => pcl5(g) (volume is increased) caco3(s)< => cao(s) + co2(g) (volume is increased)

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

How many moles of na2s2o3 are needed to react with 0.12mol of cl2? show work.