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Science > Chemisrty (paper 1) > Flashcards

Chemisrty (paper 1) Flashcards

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1
Q

What is an isotope

A

Atoms of the same element so the same number of protons with different number of neutrons

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2
Q

What’s the the two things in electrolysis

A

Cathode and anode

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3
Q

What do cathode and anode do

A

Anode attracts to cathode
And cathode attaches to anode

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4
Q

What is neutralisation

A

An example of exothermic

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5
Q

The definition of relative atomic mass

A

Total number of proton and neutron in the nucleus that’s is relative to carbon

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6
Q

Why some elements relative mass are not while numbers

A

Because isotopes have different masses

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7
Q

What is an aq

A

When a reactant or product in solution

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8
Q

Specific heat capacity of water

A

The energy required to increase the temperature of 1kg of water by 1 c

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9
Q

Specific latent heat

A

The energy required to change the state of 1kg of water from liquid to gas

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10
Q

Power meaning

A

The rate of of energy transfer

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11
Q

What’s an ion

A

A charged Particle positive or negative

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12
Q

When a alpha particle hits an atom why happen

A

It knocks off electrons if the atom i has been ionised

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13
Q

How do u calculate the relative mass

A

Sum(of isotopes abundance times isotope mass number divide by sum of abbdudqnce of all isotopes

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14
Q

What’s does chromatography do

A

Separate out mixtures

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15
Q

What’s does filtration do

A

Separate solids from liquids

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16
Q

What’s evaporation

A

Separate a soluble salt from a solution
A quick way of separating salt

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17
Q

What’s crystallisation

A

Separate a soluble salt from a solution
A slower method of separating Salt

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18
Q

What’s happens if there is more electrons away from the nucleus

A

It has higher potential energy

19
Q

What’s happens to halogens when u go down further down the group

A

It becomes less reactive it’s harder to gain an electron because the outer shell is further away from The electron

20
Q

What’s happens when u go down the group of Nobel gasses

A

There boiling points increases

21
Q

Are Nobel gasses reactive

A

No they are un reactive

22
Q

What happens when u go down group (alkali metals )

A

Low density and they become reactive

23
Q

What does aqueous means

A

Solutions that are formed when a substance are dissolved in water

24
Q

What structure does metal have

A

Giant structures

25
Q

Does metals have delocloised electrons

A

Yes

26
Q

Does metals need a lot of energy to overcome a force

A

Yes

27
Q

Do metals have a strong electrostatic force

A

Yes

28
Q

Ionic bonding occurs when ?

A

Metal and non metal

29
Q

Covalent bonding occurs when

A

Non metals only

30
Q

I’m ionic bonding when a element gains a election does it become positive or negative ?

A

Negative

31
Q

I’m ionic bonding when a element losses a electron does it become positive or negative

A

Positive

32
Q

I’m covalent bonding when they have simple molecular substance what happens

A

They have a strong covalent bonding

33
Q

What happens between individual molecules

A

They have weak intermolecular force

34
Q

Describe diamond

A

.Bonded with 4 carbon atoms
. High melting and boiling point
.large amounts of energy needed to break strong covalent bonds
.diamond does not conduct electricity

35
Q

Describe graphite

A

.carbons arranged in hexagons
. Each carbon is bonded to three other carbons
.it has one free delocalised electrons
..High melting point
.layers held by weak intermolecular forces
.giant convalent structure

36
Q

Describe graphene

A

.giant covalent structure
.it’s very strong because of the covalent bonds between the carbon atoms
.one free delcolised electron
.it’s able to conduct electricity

37
Q

Describe nano science

A

Structures are in size of 1-100n
.high surface area to volume ratio

38
Q

Describe polymers

A

.Made up of smaller units called monomers
. The chains are held by strong covalent bonds
.they have intermolecular forces that attract polymer chains to each other

39
Q

Describe buckministerfullerne

A

.First fullerene to be discovered
.formula of c60 ( 60 on the bottom )
.hollow sphere

40
Q

Describe fullerene

A

.molecules of carbon that shaped like hollow tubes or balls
. Arranged in hexagons of five or 7 carbon atoms
. They deliver drugs into the body

41
Q

What does molten mean

A

A liquid

42
Q

When metals are positive what happens to it to when it hits the negative side

A

There would be a metal coat around the negative area

43
Q

What does electrolyte mean

A

liquid or gel which contains ions and can be decomposed by electrolysis

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