Question

10th Grade Chemistry Help??

1) The element whose electron configuration is 1s2 2s2 2p6 4s2 3d10 4p2 is:
Na
Si
Al
Ga
None of the listed answers are correct
Ge

2) Which one of the following elements has five valence electrons?
n
c
f
b
none of these
all of these

3) Electrons in outermost (highest) occupied principal energy level
A- orbital electrons
B- valence electrons
C- None of the listed answers are correct
D- excited electrons
E- ionization electrons
F- core electrons

Answer 1

Ge,none of these (I think), and valence electrons