21 questions-bonding and structure

Question 1

what type of bonding happens between a metal and nonmetal

Answer 1

ionic

Question 2

what type of bonding happens 2 metals

Answer 2

metalic

Question 3

what type of bonding happens between 2 non-metals

Answer 3

covalent

Question 4

what charge do group 2 ions have

Answer 4

+2 (cause lose gain 2 electrons)

Question 5

what charge do group 7 ions have

Answer 5

-1 becayse they gain an electron

Question 6

explain in terms of electrons what happens when magnesium bonds with oxygen

Answer 6

2 electrons transfer from magnesium atom to oxygen atom which forms mg2+ ions and o2- ions

Question 7

whats the name of substances made of many oppositely charged ions joined together

Answer 7

giant ionic structure

Question 8

why do ionic substances have high melting points

Answer 8

there are strong electrostatic forces of attraction between oppositely charged ions which need lots of energy to overcome them

Question 9

explain why ionic compounds dont conduct electricity when solid

Answer 9

there are no delocalised electrons so the ioons arent free to move

Question 10

how many bonds does each carbon have in diamond

Answer 10

4

Question 10

whats the name given to the structure of diamond,graphite and silicon dioxide

Answer 10

giant covalent structrues

Question 11

explain why diamond has a high melting point

Answer 11

its a giant covalent structure with millions of strong covalent bonds between the stoms which require lots of energy to break

Question 12

why does graphite conduct electricity

Answer 12

there are delocalised electrons which can carry the charge

Question 13

explain why graphite is soft and slippery

Answer 13

there are weak forces of attraction between the laters that can be easily overcome which makes the layers free to slide over eachother

Question 14

what is graphene

Answer 14

a single layer of graphite

Question 14

which is stronger an alloy or a pure metal

Answer 14

alloy

Question 15

what is.a fullerene

Answer 15

substance made of carbon atoms aranged to form hollow structures

Question 16

what type of substances are methane oxygen and water

Answer 16

simple molecular structures

Question 17

explain why methane has a low boiling point

Answer 17

its a simple molecular substance with weak intermolecular forces between the molecules which require very little energy to overcome

Question 18

describe the main features of metals in terms of structure

Answer 18

positive metal ions arranged in layers with delocalised electrons moving through the structure