2 - bonding

Question 1

delocalised electrons

Answer 1

electrons that are not associated with any single atom or any single covalent bond

Question 2

metallic bonding

Answer 2

the electrostatic force of attraction between the nuclei of metal cations and delocalised electrons

Question 3

bond length

Answer 3

the distance between nuclei of the two atoms that are covalently bonded together

Question 4

electronegativity

Answer 4

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

Question 5

polar covalent bond

Answer 5

a type of covalent bond between two atoms where the bonding electrons are unequally distributed. because of this, one atom carries a slight negative charge and the other a slight positive charge

Question 6

a discrete (simple) molecule

Answer 6

an electrically neutral group of two or more atoms held together by chemical bonds

Question 7

a displayed (full structural) formula

Answer 7

shows each bonding pair as a line drawn between the two atoms involved

Question 8

dipole

Answer 8

said to exist when two charges of equal magnitude but opposite signs are separated by a small distance

Question 9

hydrogen bond

Answer 9

an intermolecular interaction between a hydrogen atom of a molecule bonded to an atom which is more electronegative than hydrogen and another atom in the same or a different molecule