unit 3: bonding

Question 1

for ionic bonding the particles are…

Answer 1

oppositely charged ions

Question 2

for covalent bonding the particles are..

Answer 2

atoms which share pairs of electrons

Question 3

for metallic bonding the particles are…

Answer 3

atoms which share delocalised electrons

Question 4

ionic bonding occurs in…

Answer 4

compounds formed from metals combining with non-metals

Question 5

covalent bonding occurs in most..

Answer 5

non metallic elements and in compounds of non metals

Question 6

metallic bonding occurs in…

Answer 6

metallic elements and alloys

Question 7

ionic bonding

Answer 7

-when metal atoms and non metal atoms react together, electrons from the outer shell are transferred
-metal atoms lose electrons to become positively charged ions
-non metal atoms gain electrons to become negatively charged ions

Question 8

electron transfer can be represented by a…

Answer 8

dot and cross diagram

Question 9

ionic compound

Answer 9

giant structure of ions

Question 10

what are ionic compounds held together by?

Answer 10

strong electrostatic forces of attraction between oppositely charged ions
- these forces act in all directions in the lattice and this is called ionic bonding

Question 11

covalent bonds are formed when..

Answer 11

atoms share pairs of electrons
these bonds between atoms are strong

Question 12

covalently bonded substances may consist of

Answer 12

small molecules

Question 13

some covalently bonded substances have very large molecules such as

Answer 13

polymers

Question 14

some covalently bonded substances have giant covalent structures such as

Answer 14

diamond and silicon dioxide

Question 15

metals consist of..

Answer 15

giant structures of atoms arranged in a regular pattern

Question 16

the electrons in the outer shell of metal atoms are

Answer 16

delocalised and so are free to move through the structure