Chemical Bonding + Formulas

Question 0

Octet rule

Answer 0

When bonding takes place atons generally reach an electron arrangement of 8 electrons in their valency / outer shell
Exemptions:
Transition elements
Element near helium in the periodic table

Question 1

Compound

Answer 1

A substance made of 2 or more different elements chemicakky combined

Question 2

Ionic bond

Answer 2

Force of attraction between 2 oppositely charged ionscin a compound

Question 3

Covalent bond

Answer 3

Formed when 2 atons share a pair of electrons

Question 4

Sigma bond

Answer 4

2 orbitals overlap head on

A single bond will always be a sigma bond

Question 5

Pi bond

Answer 5

2 p orbitals overlap sideways

Occurs after a sigma bond has already been formed ie. forms the second part of a double bon

Question 6

Triple bond

Answer 6

Eg N2

Consists of 1 sigma & 2 pi bonds

Question 7

Vsepr

Answer 7

-

Question 8

Shapes

Answer 8

Linear
Triangular
Tetrahedral 
Pyramidal 
V shaped

Question 9

Linear

Answer 9

180*

2 bond pair

Question 10

Triangular

Answer 10

120*

3 bond pairs

Question 11

Tetrahedral

Answer 11

*109

4 bond pairs

Question 12

Pyramidal

Answer 12

107*

2 bond pairs + loan pair

Question 13

V shaped

Answer 13

104*
3 bond pairs + loan pairs
Eg h2o

Question 14

Finding if ionic/covalent bond

Answer 14

Find the electronic negativity difference between the 2 atoms
Covalent - difference is less than 1.7
Ionic - dofference is more than 1.7