Lewis structure ch3

Question 1

valence electron is __________but __for He or Helium instead of _______

Answer 1

a group number
but valence electron is 2 for He or helium instead of 8

Question 2

decide if Lewis structure reasonable or not :

Answer 2

Question 3

dots represent the valence electron

Answer 3

Lewis stucture

Question 4

Lewis structure steps :

Answer 4

1-count the valence electron to each element and the total
2-determine if the compound ionic or covalent
3-put the leaset electronegativity in the center if the element from the same group but the least atom
4-put the electrons
5-octet rule(change in drawing as needed)

Question 5

the most important exceptions :

Answer 5

1- hydrogen surrounded by two electron only in octet rule
2- helium has two not 8 valence electron
3- Hydrogen goes always on the outside

Question 6

ionic compound

Answer 6

1-draw two seprated elements consist of loser and winner

Question 7

covalent compound

Answer 7

1-draw connected compound or one compound

Question 8

if the bond are too far ________if they are close attraction very strong

Answer 8

attraction are very weak