Atomic Structure

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  • Created by: racheon
  • Created on: 28-01-14 18:33
What do protons and neutrons make up?
The nucleus (at the centre of the atom).
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What do electrons orbit?
The nucleus (in shells).
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How big is the nucleus?
Tiny.
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Tell me 2 things about the nucleus.
It is dense and makes up almost all of the mass.
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What is most of the atom made up of?
Empty space.
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What is the relative mass and relative charge of a proton, neutron and electron?
Proton: 1, +1. Neutron: 1, 0. Electron: 1/2000, -1.
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An atom has the same number of protons as what, thus making it?
Electrons, making it neutral.
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Define isotope.
Atoms of the same element with different numbers of neutrons.
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Define atomic number.
The number of protons in the nucleus.
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Define mass number.
The number of protons and neutrons in the nucleus.
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What 2 different and 1 similar things do isotopes of the same element have?
Different masses and numbers of neutrons, same number of protons and electrons
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The 3 isotopes of carbon are c12, c13 and c14. They have the same atomic number of 6. How many neutrons does each have?
c12 - 6. c13 - 7. c14 - 8.
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Why do different isotopes of the same element react in the same way? (2)
Reactions involve electrons and neutrons make no difference to reactivity.
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Define ion.
A positively or negatively charged atom or a covalently bonded molecular ion.
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What makes an ion charged?
The have different numbers of protons and electrons.
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Na+ has a mass number of 23 and an atomic number of 11. How many electrons does it have?
10.
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Cl- has a mass number of 35 and an atomic number of 17. How many electrons does it have?
18.
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What should you ONLY change when working out ions?
The number of electrons.
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Other cards in this set

Card 2

Front

What do electrons orbit?

Back

The nucleus (in shells).

Card 3

Front

How big is the nucleus?

Back

Preview of the front of card 3

Card 4

Front

Tell me 2 things about the nucleus.

Back

Preview of the front of card 4

Card 5

Front

What is most of the atom made up of?

Back

Preview of the front of card 5
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