2. In the proper order, which choice gives the correct numbers that balance this equation?
F2(9) + _NaCl(aq) _NaFaq) + _C1219)
a. 1,1,1,1
b. 2,2,2,2
c. 1,2,2,1
d. 2,1,1,2

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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