FIC 23 Last minute stuff

Question 1

Define the word allotrope

Answer 1

Each of two or more different physical forms in which an element can exist. Graphite, charcoal, and diamond are all allotropes of carbon.

Question 2

What shape would you expect for H2Se ?

Answer 2

Linear Electron domain ( 2 total areas)

Linear Molecular geometry (2 bonding areas 0 lone pairs)

Question 3

What shape would you predict for BF4- ?

Answer 3

Tetrahedral electron domain

Tetrahedral Molecular geometry

Question 4

What is the difference between electron domain and molecular geometry

Answer 4

Electron domain = total number of groups

Molecular geometry = No. of bonding groups and lone pairs

Question 5

What shape would you predict for IF5 ?

Answer 5

Electron domain = Octahedral