An unknown element, x, reacts with sodium to form the compound na2x. in other compounds this element also can accommodate up to 12 electrons rather than the usual octet. what element could x be?
a) be
b) ai
c) f
d) ci
e) sc
f) as
g) y

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2

In a ni-cd battery, a fully charged cell is composed of nickelic hydroxide. nickel is an element that has multiple oxidation states. assume the following proportions of the states: nickel charge proportions found 0 0.17 +2 0.3 +3 0.33 +4 0.5 (a) determine the mean of the nickel charge. enter the answer to 2 decimal places.(b) determine the cumulative distribution function of nickel charge.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro