4 - Chemical Bonding and Structure

Question 1

ionic bond

Answer 1

sum of all the electrostatic and repulsive forces

Question 2

covalent bonds

Answer 2

electrons from different atoms are shared so that each atom attain a noble gas electron configuration

Question 3

electronegativity

Answer 3

relative measure of the attraction that an atom has for a shared pair of electrons

Question 4

coordinate covalent bonds

Answer 4

both of the electrons in the shared pair originate from the same atom

Question 5

resonance hybrids

Answer 5

there is more than one position for a double bond in a molecule

Question 6

giant covalent structures

Answer 6

consists of a lattice of atoms all covalently bonded together to form one giant molecule held together by very strong covalent bonds. e.g. allotropes of carbon (excluding graphite), Si, SiO2

Question 7

allotropes

Answer 7

different structural forms of the same element

Question 8

VSEPR

Answer 8

pairs of electrons are arranged around the central atom in a simple molecule or ion so that they are as mutually repulsive as possible

Question 9

metallic bonding

Answer 9

a close-packed lattice of metal cations in a “sea” of delocalised electrons

Question 10

malleable

Answer 10

to be able to be hammered into shape without breaking or cracking

Question 11

alloys

Answer 11

mixtures of more than one metal