Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > Groups Of The Periodic Table > Flashcards

Groups Of The Periodic Table Flashcards

1
Q

What is another name for group one metals ?

A

Alkali metals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Give the properties and features of the elements in group one

A
  • Very reactive.
  • All are soft easily cut metals , exposing a shiny surface.
  • The shiny surface rapidly tarnishes in air.
  • All have low density.
  • All have relatively low melting points for metals.
  • All are stored under oil to prevent reaction with oxygen and moisture in the air.
  • All react vigorously with water and burn in air.
  • All the atoms have one electron in their outer shell.
  • All form simple ions with a charge of +.
  • all have a valency of one
  • all conduct electricity
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the trends going down group one.

A
  • The reactivity increases.
  • The melting point decreases.
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Why do all group one elements have similar properties

A

Because they have one electron on their outer shell

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

When group one atoms react what happens

A

They lose they’re one outer shell electron to form an ion. The ion has a full outer shell of electrons and is stable. The one has a single positive charge.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What alkali metals float on water and how do they do this ?

A

Sodium potassium and lithium float on the surface of water becuase they are less dense than water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Do alkali metals have a low or high density

A

Low

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the observations when lithium reacts with water

A

Lithium floats on the surface
Moves about on the surface
Fizzes/gas is given off
Eventually disappears
Heat is released
Colourless solution is formed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are the observations when sodium reacts with water ?

A

It floats on the surface
Forms a silvery ball/melts
Moves about the surface
Fizzes/gas given off
Eventually disappears
Heat is released
Colourless solution forms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the observations for the reaction of potassium with water

A

Floats on surface
Moves about surface
Burns with a lilac flame
Fizzes/gas is given off
Eventually disappears
Small explosion / crackle
Heat is released
Colourless solution is formed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the general equation for group one metals reacting with water

A

Metal + water —> Metal hydroxide + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why are rubidium and caesium not generally used in laboratories

A

They are highly reactive and they’re reactions in water are explosive

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the half equation for sodium

A

+ -
Na —> Na + e

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Describe group one compounds

A

They are almost all white solids and room temperature and pressure and they dissolve in water to form colourless solutions.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is another name for group seven elements

A

The halogens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the properties and features of the group seven elements

A
  • reactive non-metals.
  • all coloured.
  • all exist as diatomic molecules
  • all react with group one elements to form solid , white ionic compounds.
  • all group seven elements have seven electrons in their outer shell.
  • all form simple halide ions with a charge of - , for e.g. Cl-
  • all have a valency of one
  • they do not conduct electricity
  • all the halogens are toxic
17
Q

What are the trends going down group seven ?

A
  • colour intensity of the elements darkens and melting point increases.
  • the melting point increases down the group and this explains why there is a clear trend from gas to liquid to solid.
18
Q

What are the physical properties of flourine

A
  • Yellow gas at room temp.
  • F molecules - molecular covalent.
    2
  • melting point is -220 degree’s
19
Q

What are the physical properties of chlorine ?

A
  • Green gas at room temp
  • Cl Molecules - molecular covalent
    2
  • Melting point = 101 degrees
20
Q

What are the physical properties of bromine

A
  • Red brown liquid at room temperature
  • Br Molecules - molecular covalent
    2
  • Melting point = 7 degrees
21
Q

What happens when you heat iodine

A

They grey black solid changes to a purple vapour on heating and the purple vapour changes back to grey black crystals on cooling. This is known as sublimation.

22
Q

Explain the trend in reactivity in grouo seven elements

A
  • when a group seven element reacts it gains one outer shell electron which completes its outer shell.
  • the elements become less reactive as you go down the group because the atom gains the electron less readily
  • ## the reason for this is the distance of the outer shell from the attractive power of the the positive nucleus. If the electron is gained into a shell close to the nucleus then it is gained very readily
23
Q

What are the observations when chlorine displaces bromide ions from solution

A

The yellow-green gas dissolved in the solution and the solution changes from colourless to orange

24
Q

What are the observations when chlorine displaces iodide ions from solution

A

The yellow-green gas dissolves in the solution and the solution changes from colourless to brown

25
Q

What are the observations when bromine displaces iodide ions from solution

A

Bromine in solution is orange and a solution of iodine in iodide ions is brown, so the solution darkens, but is only a slight change

26
Q

What is the test for chlorine

A

Damp universal indicator paper turns red and then bleaches white in the presence of chlorine

27
Q

What are the group zero metals known as ?

A

Noble gases

28
Q

What are the properties and features of group zero elements

A
  • all unreactive non metals
  • all colourless gases at room temp
  • all have 8 electrons in their outer shell
  • they don’t have a valency because they have a full outer shell
  • the boiling points increase down the group due to an increase of the strength of the van der whalls forces beetween the atoms
29
Q

What colour is the copper II oxide compound

A

Black

30
Q

What colour is the copper II carbonate compound

A

Green

31
Q

What colour are copper II salts In solution

A

Blue

32
Q

What colour is hydrated copper II Sulfate

A

Blue

Chemistry (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions