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Chemistry > Atomic Structure And The Periodic Table > Flashcards

Atomic Structure And The Periodic Table Flashcards

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1
Q

Smallest part of an element

A

Atom

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2
Q

How many different elements

A

100

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3
Q

Mixtures

A

Two or more elements or compounds

Can be separated by physical processes

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4
Q

Filtration

A

Separates soluble solids from insoluble

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5
Q

Crystallisation

A

Obtain a soluble solid from a solution

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6
Q

Distillation

A

Different boiling points

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7
Q

Chromatography

A

Separate different soluble coloured components

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8
Q

Thomson

A

1898

Electrons
Negative
Surrounded by a sea of positive charge

Plum pudding

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9
Q

Geiger and marsden experiment

A

Pg 10

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10
Q

Rutherford

A

Positive charge atom in centre nucleus

Nuclear model

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11
Q

Bohr

A

Electrons orbit

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12
Q

Chadwick

A

Evidence of neutrons in the nucleus

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13
Q

Later experiments

A

Nucleus= positive charge

Positive charge particles= protons

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14
Q

Subatomic particle

A

Proton
Neutron
Electron

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15
Q

Atoms have no charge because

A

Equal number of protons and elections

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16
Q

Atomic number

A

Number of protons

17
Q

Mass number

A

Sum of protons and neutrons

18
Q

Isotopes

A

Same number of protons

Different number of neutrons

19
Q

Form positive ions when

A

Lose electrons

Metal atoms

20
Q

Form negative ions when

A

Non metal

Gain electrons

21
Q

New land

A

Arranged elements by atomic weight

22
Q

Mendeleev

A 
Left gaps
Reordered 
Groups
Periods
Atomic number
23
Q

Group 0

A 
Noble gases 
Full outer shell
Very stable
Very un reactive
Boiling points increase down
24
Q

Group 1

A

Alkali
One electron on outer
Low melting and boiling which decrease going down
More reactive going down

Stored in oil because react with oxygen

Low density

25
Q

Alkali which float

A

Lithium
Sodium
Potassium

26
Q

When a metal hydroxide dissolves in water

A

Alkaline solution is produced

27
Q

Alkali metal and non metal

A

Form ionic compound

28
Q

Group 7

A

Non metals
Halogens
Seven electrons
Diatomic
React with metals to produce ionic salts
More reactive will displace and less reactive

29
Q

Transition metals

A

Centre of table
From coloured compounds
Ions with different charges
Can be used as catalysts

Good conductors of electricity and heat
Can be easily bent or hammered into shape

Chemistry (6 decks)

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