C2-Periodic table

Question 1

A row on the periodic table is called?

Answer 1

Period

Question 2

A column on the periodic table is called?

Answer 2

Group

Question 3

What development on the periodic table did dalton make?

Answer 3

He assigned atomic weights to the atoms of the 20 elements he knew of at the time.

Question 4

What development on the periodic table did Newlands make

Answer 4

Was the first to arrange the elements into a periodic table with increasing order of relative atomic mass

Question 5

What development on the periodic table did Mendeleev make?

Answer 5

He created a framework that became the modern period table, leaving gaps for unknown elements and ordering them by atomic weights.

Question 6

Describe the reactivity trend of group 1 metals and water

Answer 6

It increases as you go down the group as there is less pull on that single electron so is lost easily.

Question 7

When will a group 7 element displace another element from group 7

Answer 7

The higher up the group the more reactive.

Question 8

Chlorine + sodium iodide-)

Answer 8

Sodium chloride + iodine

Question 9

Using electronic structure, how can you tell which period an element is in?

Answer 9

By seeing how many shells it has.

Question 10

Using electronic structure, how can you tell which group an element is in?

Answer 10

By seeing how many electrons they have in the outer most shell.

Question 11

How do you work out atomic number?

Answer 11

Number of protons.

Question 12

How do you work out atomic mass

Answer 12

Number of protons plus neutrons.

Question 13

Define element

Answer 13

An element can not be broken down into any other substance smaller than it.

Question 14

Give an example of a transition metal

Question 15

Describe the reactivity of group 0 elements using electronic structure

Answer 15

As they have a full outer shell they find it really hard to loose or gain electrons therefore not very reactive.

Question 16

Group one is also called

Answer 16

Alkali metals

Question 17

Group 2 is also called

Answer 17

Alkali earth metals

Question 18

Group 7 is also called

Answer 18

Halogens

Question 19

Group 0 is also called

Answer 19

Noble gasses

Question 20

Describe the reactivity of group 7 elements

Answer 20

As you go down the group it decreases in reactivity .

Question 21

Describe how lithium will react with water

Answer 21

Effervescence, movement, turns water alkaline.

Question 22

Describe how sodium will react with water

Answer 22

More effervescence , ball of molten metal, more movement and more alkaline

Question 23

Describe how potassium will react with water

Answer 23

Combusts with a lilac flame, very violent movement, lots of gas’s given off.

Question 24

How is the periodic table ordered?

Answer 24

By atomic number

Question 25

How were the early lists of elements ordered?

Answer 25

Atomic mass

Question 26

Why did mendeleev swap the order of some of the elements?

Answer 26

To group them by there chemical properties

Question 27

Why did mendeeev leave gaps in his periodic table?

Answer 27

To leave room for elements that had not yet been discovered.

Question 28

Why do elements in a group have similar chemical properties?

Answer 28

As they have the same number of electrons in there outer shell.

Question 29

Where are metals and non metals located on the periodic table?

Answer 29

Metals to the left and non metals to the right

Question 30

Why are alkali metals named this?

Answer 30

As they form an alkali solution when reacted with water.

Question 31

Metal + oxygen =?

Answer 31

Metal oxide

Question 32

Metal + chlorine=?

Answer 32

Metal chloride

Question 33

Metal + water=?

Answer 33

Metal hydroxide + hydrogen

Question 34

Why does the reactivity of alkali metals increase down the group

Answer 34

As the valence electron is further from the nucleus there is less pull on it. Meaning it is easier for it to leave and react with something else

Question 35

Give the formula for the first 4 halogens

Answer 35

F2, Cl2, Br2, I2

Question 36

How does the melting point of halogens change down the group?

Answer 36

It increases

Question 37

How does the reactivity of halogens change down the group?

Answer 37

It decreases

Question 38

Why does the reactivity of halogens decrease down the group?

Answer 38

As the lower down elements are larger atoms there is more shielding from other electrons meaning there is less force pulling electrons in, making it harder to gain electrons.

Question 39

What Is a displacement reaction?

Answer 39

When a more reactive element takes the place of a less reactive one in a compound.

Question 40

Why are the noble gases inert?

Answer 40

As they have a full outer shell

Question 41

How do the melting points of the noble gases change down the periodic table?

Answer 41

It increases

Question 42

What is oxidation ?

Answer 42

When an atom looses an electron.

Question 43

What is reduction?

Answer 43

When an atom gains an electron.

Question 44

What is a diatomic molecule?

Answer 44

When an element is made up of 2 atoms

Question 45

What ions do metals and non-metals form?

Answer 45

Metals - positive ions
Non-metals either negative or no ions.