Question

What is the total number of valence electrons in the dot structure of CBr4? Explain how you determined this answer. What is the name of the 3-dimensional shape this molecule forms? (you may figure this out on scrap paper and just write the correct answer)

Answer 1

Answer:- There are 32 valence electrons and it's tetrahedral in shape.

Explanations:- Atomic number of carbon is 6 and it's electron configuration is
`1s^22s^22p^2` . It has 4 electrons in the outer most shell means it has 4 valence electrons.

Atomic number of Br is 35 and it's electron configuration is
`1s^22s^22p^63s^23p^64s^23d^1^04p^5` . It has 7 electrons in the outer most shell(2 in 4s and 5 in 4p) .

There is one C and four Br in the given compound. So, total number of valence electrons = 4+4(7) = 4+28 = 32

Four Br atoms are bonded to the central carbon atom and also there isn't any lone pair present on carbon. It makes it tetrahedral.