If aluminum has a mass of 22.3 g, how many liters of oxygen gas are required at STP?

The correct answer is c

13) a 14) a15) b16) i don't know sorry17) a (maybe)

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day