Module 1 Shapes of Molecules

Question 1

How would you show an bonded atom going away from the center atom?

Answer 1

A dotted line shows an atom moving away from the center atom

Question 2

How would you show a bonded atom coming towards you but away from the center atom

Answer 2

a small right angle triangle (doesn’t have to be accurate) is used to show atoms coming towards you.

Question 3

how would you show an atom being flat against the page?

Answer 3

A normal line shows an atom being flat against the page.

Question 4

What degree angle do 2 bonds have between them? For e.g. CO2 And what is the structure called?

Answer 4

180 degree’s

Linear

Question 5

what degree angle do 3 bonds have between them? for e.g. BF3 And what is the structure called?

Answer 5

120 degree’s

Trigonal planar

Question 6

what degree angle do 4 bonds have? For e.g. CH4

And what is the structure called?

Answer 6

109.5 degree’s

Tetrahedral

Question 7

How does a lone pair of electrons effect the bond angle?

Answer 7

A lone pair increases the bond degree distance by the equivalent of one extra bond +2.5 degrees. For e.g. the bond angle of H2O would be 104 degrees.

Question 8

What degree angle would 6 bonds have? For e.g. SF6

And what is the structure called?

Answer 8

90 degrees

octahedral

Question 9

What degree angle would 5 bonds have? For e.g. PCl5

And what is the structure called?

Answer 9

120 degree’s against the page, 90 degree’s up and down

Trigonal Bipyramidal