3. covalent bonding

Question 1

molecules are

Answer 1

groups of atoms bonded together

Question 2

molecules are held together by

Answer 2

covalent bonds

Question 3

definition

covalent bond

Answer 3

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

Question 4

most of the time the central atom ends up with

Answer 4

8 electrons in its outer shell

Question 5

sometimes central atom can have

Answer 5

less than 8 electrons in their outer shell

e.g. boron trifluoride boron only has 6 electrons in its outer shell

Question 6

few compounds can use d orbitals to expand the octet which means
e.g. sulfur hexafluoride

Answer 6

they have more than 8 electrons in their outershell

e.g. SF6 S has 12 electrons in its outer shell

Question 7

e.g. of molecule that has 2 shared pair of electrons (double bond)

Answer 7

e.g. O2

Question 8

e.g. of a molecule that has 3 shared pair of electrons (triple bond)

Answer 8

e.g. N2

Question 9

dative covalent bond is where

Answer 9

both electrons come from one atom

Question 10

covalent bonding happens between

Answer 10

2 non metals