Meh

Question 1

What did mandeleev order his period table in order of

Answer 1

Relative atomic weight/mass

Question 2

How did madeleevbreak his own rules

Answer 2

He arranged the elements by switching iodine and tellurium

Question 3

Why did madeleev switch iodine and tellurium

Answer 3

They have similar properties to the other group

Question 4

How did mandeleev know his table was correct

Answer 4

He predicted undiscovered evidence

Question 5

How many electrons are in the outer shell of an electron

Answer 5

1

Question 6

What is the trend in activity as you go down the group in group 1(alkalis)

Answer 6

It increases

Question 7

What else increases as you go down the groups

Answer 7

Melting and boiling points

Question 8

How many electrons are in the outer shell of halogens group 7

Answer 8

7

Question 9

How do you calculate relative formula mass

Answer 9

Energy change = in(A) - out(B)
In= A -A
B-B
Out= 2 x A - B

Question 10

What happens to the trend in reactivity as you go down group 7

Answer 10

Decreases

Question 11

In group 0 noble gases how many electrons are in the outer shell

Answer 11

0

Question 12

What is the trend in reactivity when going down group 0 noble gases

Answer 12

Unreactive

Question 13

What type of bonding does brass have

Answer 13

Metallic

Question 14

What type of bonding does sulfur dioxide have

Answer 14

Covalent

Question 15

What type of bonding does nitrogen chloride have

Answer 15

Covalent

Question 16

What type of bonding does copper oxide have

Answer 16

Ionic

Question 17

What type of bonding does iron have

Answer 17

Metallic

Question 18

What type of bonding does sodium fluoride have

Answer 18

Ionic

Question 19

Describe the electronic structure of the atoms and ions

Answer 19

• metal atom loses electrons to become positive
• non metals gain electrons to become negative ion
• these then attract each other, this is called electrostatic attraction which binds the atoms together (ionic bonding)

Question 20

Describe a high melting point

Answer 20

• giant lattice structure
• strong electrostatic attraction between oppositely charged ions
• needs a large amount of energy to break

Question 21

Describe when ions conduct electricity when in molten or in solution

Answer 21

•ions can seperate and are free to move

Question 22

Describe ions when they conduct electricity when solid

Answer 22

Ions are fixed and can’t move

Question 23

Explain low melting point

Answer 23

• weak intermolecular forces between molecules

* needs a small amount of energy to break

Question 24

Explain when ions can’t conduct electricity

Answer 24

• molecules have no overall charge as they are neutral

* Atoms are fixed and can’t move

Question 25

What is an alloy

Answer 25

A mix of 2 metals that don’t react

Question 26

Why are alloys harder than pure metals

Answer 26

• The other metal distorts the layers

* the layers can slide over each other easily

Question 27

Equation for acids and bases

Answer 27

Acid + base —> salt + water

Question 28

Acids and metals equation

Answer 28

Acid + metal —> salt + hydrogen

Question 29

Acids and metal carbonates equation

Answer 29

Acid + metal carbonate —> salt + water + carbon dioxide

Question 30

Acids and alkali equation

Answer 30

Acid + alkali —> salt + water

Question 31

Ph and substance description of soda water

Answer 31

PH6 very weak acid

Question 32

PH of car battery acid

Answer 32

1

Question 33

PH of soap

Answer 33

8

Question 34

PH of washing soda

Answer 34

10

Question 35

PH of stomach acid

Answer 35

2

Question 36

PH of oven cleaner

Answer 36

14

Question 37

PH of vinegar

Answer 37

4