How many valence electrons do the following atoms have na al n ar

Na has 1 valence electron

Al has 3 valence electrons

N has 5 valence electrons

Ar has 8 valence electrons

Explanation:

the number of valence electrons is equal to the atom's main group 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

24

i think its 5049.

i hope this !