Science

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  • Created by: Annum1345
  • Created on: 12-11-16 11:06
What is a Particle?
A Particle is a tiny piece of matter
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Give three examples of particles?
Atoms, ions and molecules
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Why can't you compress a substance in its solid state but in it liquid state?
As there is no space for particles to move into in a solid state.
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Why are models used in science?
models are used in science to solve problems,to make predications and to develop understanding
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What is a physical change?
A physical change is a substance changes state or shape or breaks in to pieces.
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What is a chemical change?
A chemical change is a change which produces new susbtances
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What happens when a substance changes state?
When a substance change state its arrangement and movement change not its particles
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What happens in a chemical reaction?
In a chemical reaction particles break and join together in different ways
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What are atoms?
Atoms are the smallest part of a particles that make up a substance.
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What is the equation for ratio?
Ratio of distance to diameter=Distance between atom divided by diameter of an atom
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What are forces between particles?
There is an electrostatic force between negative and positive charges
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What happens to the forces when there are further apart?
As the force get further apart the bond becomes weaker
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what are the limitation of models?
It doesn't show: the forces between particles,the size of the particles and the space between the particles.
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What is a molecule?
A molecule is made of more than on atoms joining together
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What it is inside a particle?
subatomic particles
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what is a mass number?
A mass number tells you the number of protons and neutrons together
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What are is the atomic number?
The atomic number tells you the number of protons and electrons
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what are isotopes?
Iscotopes is an element with the same same numbers of electrons and protons nut different number of neutrons
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What are ions?
Ions are charged particles.They are formed when atoms or groups of atoms lose or gain electrons.
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When did Dalton discover the particles model?
1803
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What was Dalton theory?
All things are made from atoms and atoms are tiny hard spheres
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When did thompson discover the electron?
1897
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what was Thompson's theory?
Atoms had an overall charged therefore had to contain a positive charge
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What was Rutherford theory?
Rutherford theory was that electron orbit around a nucleus
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What had Bohr did?
Bohr had developed Rutherford experiment
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Other cards in this set

Card 2

Front

Atoms, ions and molecules

Back

Give three examples of particles?

Card 3

Front

As there is no space for particles to move into in a solid state.

Back

Preview of the back of card 3

Card 4

Front

models are used in science to solve problems,to make predications and to develop understanding

Back

Preview of the back of card 4

Card 5

Front

A physical change is a substance changes state or shape or breaks in to pieces.

Back

Preview of the back of card 5
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