find the element has 4 valence electrons and 3 energy levels.
a
Gallium (Ga)
b
Aluminum (Al)
c
Scandium (Sc)
d
Silicon (Si)
1 answer
b. Aluminum (Al)
a
Gallium (Ga)
b
Aluminum (Al)
c
Scandium (Sc)
d
Silicon (Si)
1 answer