C9 Periodic Table

Question 1

What is the charge on group l and group ll ions?

Answer 1

They are metals so they lose electrons to form a postive charge
Group l forms 1+ ions
Group ll forms 2+ ions

Question 2

Which element has the highest density in group l

Answer 2

Caesium

Question 3

Which element in group l has the highest melting point?

Answer 3

Lithium

Question 4

General reaction of a group l element with water

Answer 4

Vigorous reaction with water producing an alkaline solution. Bubbles will be seen due to the production of hydrogen

Question 5

Why does reactivity increase down group l?

Answer 5

Group l lose an electron when they react

Question 6

Trend in the reactivity with water down group l?

Answer 6

Reactivity increases down the group

Question 7

General properties of transition metals

Answer 7

-high melting points
-form coloured conpounds
-often act as catalysts

Question 8

Why is argon used to fill electric light bulbs

Answer 8

It is very chemically inert so will not react when the light bulb gets hot. It is non flammable

Question 9

What properties of helium makes it suitable for use in balloons?

Answer 9

It is less dense than air and doesn’t burn

Question 10

Why are the noble gases chemically inert?

Answer 10

They have full outer electron shells. This is a very stable electron configuration and means elements are unreactive.

Question 11

Chemically inert

Answer 11

Not chemically active

Question 12

How many electrons do the noble gases have in their outer shell?

Answer 12

0. Theres no incomplete shells

Question 13

Noble gases are monatomic gases. What does monatomic mean?

Answer 13

Molecules consist only 1 atom

Question 14

What name is given to elements in group 0

Answer 14

Noble gases

Question 15

Why do elements in the same group have similar chemical properties?

Answer 15

Elements in the same group have the same number of electrons in their outer shell, so they react in a similar way

Question 16

How does non metallic character change across a period?

Answer 16

It increases across the period

Question 17

How does metallic character change across a period?

Answer 17

It decreases across the period

Question 18

Where are metals and non metals found in the periodic table

Answer 18

Metals: towards the left
Non metals: top right

Question 19

How is the periodic table arranged?

Answer 19

The elements are arranged in order of increasing atomic number. This places elements in vertical groups and horizontal periods

Question 20

When does a halogen displacement reaction occur?

Answer 20

When a more reactive halogen dispalces a less reactive halogen from an aqueous solution of its halide ions

Question 21

Why do melting and boiling point increase down group Vll?

Answer 21

The molecules get bigger down the group so there are stronger intermolecular forces to overcome during melting/boiling

Question 22

What is the trend in color and destiny of grp Vll elements?

Answer 22

Color gets darker down the group
Density increases down the group

Question 23

Why are halogens at different states at room temperature? What is the trend down the group?

Answer 23

Cuz they have different melting and boiling points. Melting and boiling points increase as you go down the group

Question 24

Color and state of iodine at toom temperature?

Answer 24

Black solid

Question 25

Color and state of bromine at room temp?

Answer 25

Red brown liquid

Question 26

Color and state of chlorine at room temp?

Answer 26

Pale green gas

Question 27

Halogens are diatomic. What does this mean?

Answer 27

They form molecules consisting of 2 atoms

Question 28

Which group do the elements chlorine, bromine and iodine belong to?

Answer 28

Group 7, Halogens

Question 29

What is the charge on group VI and VII ions?

Answer 29

They are non metals so they gain electrons to form negative ions

Question 30

How does density change down in grp l?

Answer 30

Density increases.

Question 31

How does melting point change down group 1?

Answer 31

It decreases down the group bc the strength of the metallic bonds decreases so less energy is required to break these bonds to turn the solid to liquid

Question 32

What trends can be seen in group I elements (lithium, sodium and potasium?)

Answer 32

All relatively soft metals
Trend in melting points
Trend in density
Trend in reactivity with water

Question 33

Which group do lithium sodihm and potassium belomg to

Answer 33

Group 1

Question 34

What is the periodic table?

Answer 34

A method of classying elements

Question 35

How many elecrons are in the outer shell of a group V element?

Answer 35

Five

Question 36

Why can’t iodine displace chlorine or bromine from an aqueous ionic solution?

Answer 36

Because reactivity decreases down the group and iodine is below chlorine and bromine. Displacement would occur if iodine was more reactive than them

Question 37

Which halogen can’t be displaced from an aqueous ionic solution by bromine?

Answer 37

Bromine

Question 38

Which halogens can chlorine dispalce from an aqueous ionic solution?

Answer 38

It can displace any halogens below it in the group VII. It will displace iodine and bromine

Question 39

Why does reactivity decrease doan group VII?

Answer 39

They gain an electron when they react. As you go down the group, atomic radius and electon shirling increase. This means that the attraction between the nucleus and outer electrons decrease so it is harder for the atom to gain an electron