chemical bonding (10)

Question 1

non-polar covalent (pure covalent)

Answer 1

• found between non-metals
• generally diatonic molecules
• will form non-polar/neutral molecules
• electron negativity difference is 0

Question 2

when answering non-polar covalent bonds

Answer 2

1) draw the lewis diagram for each
2) draw the bonding pair
3) state and subtract the electron from negativity

conclude : because the en difference is equal to 0 it is a non- polar covalent bond and a non- polar molecule will be formed

Question 3

polar covalent bonding

Answer 3

• between two or more non-metal atoms
• electrons negativity difference more then 0 less then 1,8

0<=1,7
- forms a dipole molecule with a slightly negative and slightly positive side

Question 4

how to answer polar covalent bonding

Answer 4

1) draw the lewis diagram
2) show the bonding as well as the s+ / s- sides
3) look at each bond separately
4) write down the electron negativity and it’s difference

conclude : x is a polar covalent bond, therefor a polar molecule is formed which mean x is also a dipole molecule and as an en difference of y

Question 5

ionic bonding

Answer 5

• only occurs between metals and non-metals
• group 1 <3 group 6+7
• group 2 <3 group 6+7
• electrons negativity must be greater then or equal to 1,8

Question 6

how to answer ionic bonding

Answer 6

1) show the metal and it’s valence electrons
2) show the bonding
3) do the electrons negativity and it’s difference etc

Question 7

lose electrons

Answer 7

positively charged

Question 8

gained electrons

Answer 8

negatively charged

Question 9

metallic bonding

Answer 9

• only occurs between two metals

- all properties of metals are a result of the loosely packed electrons

Question 10

how to answer metallic bonding

Answer 10

1) draw and label the diagram
2) write the definition
3 conclude