7. E. C = 152, 252, 2p6 = 2 represents second shell - total of 2 + 6 = 8 electrons on the second shell. This element is in group 8. Identity
is Neon (add up all the electrons 2+2+6= 10). Neon is number 10
on table

"the periodic table is arranged in order of atomic number."

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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