Shapes of molecules: NO LONE PAIRS

Question 1

What do solid lines mean?

Answer 1

= lay on the plane

Question 2

What does a solid wedge mean?

Answer 2

= bond is coming out the plane

Question 3

What does a dotted wedge tell us?

Answer 3

= projecting back behind the plane

Question 4

What is electron pair repulsion theory?

Answer 4

= the shape of the molecule is determined by:
= electron pairs surrounding the central atom
= pairs of electrons repel all of the other electron pairs
= electron pairs move as far apart from eachother

Question 5

What is the shape of molecule if the central atom has 2 bonds?

Answer 5

= linear structure- straight line
= angle between both bonds is 180

Question 6

What is the shape of a molecule if the central atom has 3 covalent bonds?

Answer 6

= arrange themselves in a triangle- trigonal planar
= the bond angle between them is 120 degrees

Question 7

What is the shape of a molecule if the central atom has 4 covalent bonds?

Answer 7

= tetrahedral
= all the bond angles are 109.5 degrees

Question 8

What is the shape of a molecule if the central atom has 5 covalent bonds?

Answer 8

= trgonal bipyrimidial
= trigonal: 3 atoms on central plane form a triangle
bipyrimidial: forms 2 pyrimaid shapes with 2 atoms

Question 9

What is the shape of a molecule if the central atom has 5 covalent bonds?

Answer 9

= octahedral