science revision

  • Created by: Lcoote1
  • Created on: 05-05-18 16:23
Define mass
is a measure of how muchmatter there is in an object
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Define weight
a measure of the gravitational pull there is on an object
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Define density
Is the mass of an object per unit volume
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heat being transfered into electrical energy
Water heated to produce steam.............Steam turns a turbine.........turbine turns a coil in a generater.............. electricityis produced
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What is an element
substances on the periodic table ...........they r a substance that cannot be broken down...............EG Carbon is an element made up of carbon atoms
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what are atoms
An atom is the smallest part of an element
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What are atoms made up of
Protons.........neutrons........electrons
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mass and charge of protons electrons and neutrons
protons-mass 1 +1 charge..............Neutron-Mass of 1 charge of 0.................Electron almost 0 mass charge of -1
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Wha is inside the neucleus
protons and neutrons
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Where are the electrons in an atom
Spread around the edge of an aton.......they orbit the neucleus layers called shells
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protons
positive chargemass of 1
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Neutrons
No charge, mass of 1
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electrons
negative charge, mass of almost 0, are in shells orbiting the neucleus
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What is the atomic number
The number of protons in an atom.............. The atomic number is the BOTTOM number
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What is the mass number
The number of protons and neutrons................The TOP number
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How to find the amount of neutrons
Mass number - Atomic number(Protons)= Neutrons
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proton and electrons
Protons=Electron...EQUAL
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Summery
Protons are positively charged and neutrons are neutral.......Atomic number is the number of protons........Mass number is the biggest and is the number of protons and neutrons........each element has a fixed number of protons
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Shells
shells are the layerws around the neucleus ...........2,8,8
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what are isotopes
Elements that have a different mass number and the same atomic number .......EG - 12C6 and 13C6
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Isotopes have the same number of ... but different number of .......
Same protons and different neutrons
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same/different chemical properties and same/different pyysical
Same chemical different physical
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what is ionic bonding?
It is a bonding that occurs when a metal and a non metal react together. the metal looses its electron and the non metal gains the electron
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what is metalic bonding/
A bonding which is formed between the atoms of a metal
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What is covalent bonding?
A bonding that takes place between non metals
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What is a compound
A substance which containstwo or more elements chemically jopining
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What is an aion
it is an ion that carries a negative charge, causes it to migrate to a positive electrode, there are more protons whic results in a negative charge...............they are non metals
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What are cations?
Ions with a positive charge........ more protons that electrons whuch results in a positive charge........ cations are metals
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If something is ductile it can
Be drawninto thin shapes without it braking
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if something is mallebable it can
Bend easily and be hammered into shape
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Other cards in this set

Card 2

Front

Define weight

Back

a measure of the gravitational pull there is on an object

Card 3

Front

Define density

Back

Preview of the front of card 3

Card 4

Front

heat being transfered into electrical energy

Back

Preview of the front of card 4

Card 5

Front

What is an element

Back

Preview of the front of card 5
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