Author Question: How many valence electrons are in silicon? A) 2 B) 4 C) 5 D) ... (Read 79 times)

LCritchfi · **on:** Aug 27, 2018

How many valence electrons are in silicon?

A) 2
B) 4
C) 5
D) 7

Question 2

What is the source of atmospheric pressure?

A) It is the weight of the air above that is pushing down on us.
B) It is the interatomic attraction between air molecules.
C) It is the potential energy stored in the gas molecules.
D) It is the stored solar energy in gas molecules.
E) none of the above