Unit 1 : Covalent Bonds

Question 1

What is a Covalent bond

Answer 1

The result of two positive nuclei being held together by their common attraction for the shared pair of electrons

Question 2

What is a pure covalent bond

Answer 2

If the atoms forming a covalent bond have the same electronegativity the atoms pull the electrons to the same extent and will share electrons equally to form pure covalent bonds

Question 3

What is a non polar covalent bond

Answer 3

If the electronegativity difference between the atoms in a covalent bond is less than 0.4, we consider the bond to be non-polar

Question 4

What is a polar covalent Bond

Answer 4

If the atoms in a covalent bond have sufficient difference in electronegativity, (from 0.5 to 2.0 )the atom with the higher electronegativity will pull the electrons more to one side to form a polar covalent bond

Question 5

How do we know if a molecule is polar

Answer 5

If the structure of the molecule is not symmetrical then it’s most likely polar

Question 6

what type of intermolecular forces do polar molecules contain

Answer 6

London dispersion forces and permanent dipole-permanent dipole forces

Question 7

How do we tell if a molecule is non polar

Answer 7

If the structure of the molecule is symmetrical then it is likely to be non polar

Question 8

What type of bonds do non polar molecules contain

Answer 8

London dispersion forces only