What is the final chemical equation from the following intermediate chemical equations? P4O6(s) → P4(s)+3O2(g) P4(s)+5O2(g) --P4O10(s)
P406(S) + 2O2(g) → P4010(s)
O P408(s) + 802(g) → 2P4(s) + P4010(s) O P406(S) + 1502(g) → P4(s) + P4010(s) h O P406(S)+(5/3)O2(g) → P4010(s)

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

i believe the answer is a.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §