structure and bonding

Question 1

what is a covalent bond

Answer 1

the strong electrostatic attraction between a shared pair of electrons and the nuclei of the bonded atoms

Question 2

what is a dative covalent bond

Answer 2

a pair of electrons shared between 2 atoms, but the pair of electrons are donated by 1 of the atoms only

Question 3

what is the bond angle of a trygonal planar molecule

Answer 3

120°

Question 4

what is the bond angle of a trygonal pyramidal molecule

Answer 4

107°

Question 5

what is the bond angle of a tetrahedral molecule

Answer 5

109.5°

Question 6

what is the bond angle for a bent molecule

Answer 6

104.5°

Question 7

what is the bond angle of an octahedral molecule

Answer 7

90°

Question 8

what is electronegetivity

Answer 8

the ability of an atom to attract the bonding pair of electrons in a covalent bond

Question 9

what is the most electronegetive element

Answer 9

Flourine

Question 10

what are C and H considered to have

Answer 10

the same electronegetivity

Question 11

when does a polar bond occur

Answer 11

when the atoms in the bond have different electronegativities

Question 12

what are london forces

Answer 12

in a non-polar molecule, the electrons are constantly moving
unequal distribution of e- causes a temporary dipole
this induces a dipole in the adjacent molecule
the larger the molecule, the bigger the temporary dipole and the stronger the london forces