3
AssignmentMultiple Choice

Changes in Matter

Question 3 • *26-27 CFISD TX-Chemistry A CR

Which model represents the electron dot diagram of silicon?

Answer
A
[Image: Si with 2 dots above and 2 dots below....]
B
[Image: Si with 1 dot each above, below, right, left....]
C
[Image: Si with 2 dots above and 1 dot each below, right, ...]

Explanation

Silicon is in Group 14, so it has 4 valence electrons. Its electron dot diagram places one dot on each of the four sides of the Si symbol before any dots are paired. Choice B shows one dot above, below, right, and left of Si.

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