structure and bonding

Question 1

what are the three types of chemical bonds

Answer 1

ionic, covalent and metallic

Question 2

what is an ionic bond

Answer 2

a bond betweeo a metal and non metal in which electrins have been exchanged

Question 3

what is a covalent bond

Answer 3

a bond between the two non metals in which electrons are shared

Question 4

what is a metallic bond

Answer 4

a bond between metal wtoms in which electrins are delocalised

Question 5

how does an ionic compound form

Answer 5

the metal loses electrons to get full outer shell becomingn a positively charged ion while tje non metal gains electrons becoming a negatively charged ion, the oppositely charged iond are electrostatically attracted to each other

Question 6

what is the charge of an ion from group 1

Answer 6

+1

Question 7

what is the charge of an ion from geoup 2

Answer 7

+2

Question 8

what is the charge of an ion from group 6

Answer 8

-2

Question 9

what is the charge of an ion from group 7

Answer 9

-1

Question 10

what is an ionic compound

Answer 10

a giant structure of ions which are held together by strong electrostatic forces of attraction between oppositely charged ions

Question 11

what are simple molecules

Answer 11

small molecules such as oxygen and water thay contain atoms joined together by covalent bonds

Question 12

what is the state symol of a solid

Answer 12

s

Question 13

what is the state synbolnof a liquid

Answer 13

l

Question 14

what is the state symbol of a gas

Answer 14

g

Question 15

what is the state symbol for an aqausos sokuyion

Answer 15

aq

Question 16

what are the properties of ionic compounds

Answer 16

high melting and boiling point, dont conduct electricity when solid but do when molten or dissolved

Question 17

why do ionic compounds have a high melting and boiling point

Answer 17

strong bonds between molecules which takes lots of energy to overcome

Question 18

why cant ionic compounds conduct electricity when solid

Answer 18

ions are unable to move freely

Question 19

why can ionic compounds conduct electricity when molten or dissolved

Answer 19

ions are free and so are able to move

Question 20

what are the properties of simple molecules

Answer 20

low melting and boiling point, poor conductors

Question 21

why do simple molecules have low melting and boilinh points

Answer 21

weak bonds between the molecules and so little energy is needed to overcome these bonds

Question 22

what are examples of giant covalent structures

Answer 22

diamond and graphite

Question 23

what is the structure of a diamond

Answer 23

each carbon atom is covalently bonded to 4 others in a giant structure

Question 24

what is the struvutre of graphite

Answer 24

each carbon atoms is covalently bonded to 3 others in a giant structures

Question 25

why can graphite conduct electricity

Answer 25

it has free electrons which are able to move

Question 26

why do diamond and graphite have high melting and boiling points

Answer 26

strong covalent bonds between atoms which twke lots of energy to overcome

Question 27

what is graphene

Answer 27

a single layer of graphite

Question 28

what are the properties of graphene

Answer 28

conducts electrcitity and very strong

Question 29

what are fullerenes

Answer 29

molecules of carbon atoms with hollow shapes