Atoms

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Where is the nucleus?
In the middle of the atom.
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What does the nucleus contain?
Protons and neutrons
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What is the charge and why?
It is positively charged because of the protons.
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How much of the mass of the atom is there and where is it concentrated in?
Almost the whole mass of the atom is concentrated in the nucleus.
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In comparison to the rest of the atom, how big is the nucleus?
Tiny
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What do the electrons do?
They move around the nucleus.
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What is the charge of electrons?
They are negatively charged.
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Although electrons are small, what do they do?
They cover alot of space.
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How can we determine how big the atom is?
The volume of the electron's orbit.
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How much mass do electrons have?
They have virtually no mass.
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What are they arranged in?
They are arranged in shells around the nucleus.
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What charge to neutral atoms have?
No charge overall.
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The charge on the electrons is the same size as what?
As the charge on the protons.
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Number of protons are always equal to what?
They are always equal to the number of electrons in a neutral atom.
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What is the atom called when neutrons are added or removed?
When the atom becomes charged, it is a neutral atom.
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What do we know about the number of neutrons?
It isn't fixed but is usually the same as the number of protons.
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How do we determine what an element is?
The number of protons in an atom decide what element it has.
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If helium has 2 atoms, what does this tell us about other 2 atomed elements?
It must be the element Helium.
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Why do elements have different properties from each other?
This is due to differences in the atomic structure.
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Other cards in this set

Card 2

Front

What does the nucleus contain?

Back

Protons and neutrons

Card 3

Front

What is the charge and why?

Back

Preview of the front of card 3

Card 4

Front

How much of the mass of the atom is there and where is it concentrated in?

Back

Preview of the front of card 4

Card 5

Front

In comparison to the rest of the atom, how big is the nucleus?

Back

Preview of the front of card 5
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