Atomic Structure and the Periodic Table. C2 Topic 1

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  • Created by: Shamual
  • Created on: 23-11-14 14:03
How did Mendeleev create the first periodic table?
Cards based on their mass and their reactions.
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What did Mendeleev create his periodic table for?
To identify elements that had not been discovered, and their property's.
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Why did it take such a long time for the world to learn about Mendeleev's periodic table?
Because there was no easy form of communication.
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What does an atom look like?
A nucleus in the center made up of protons and neutrons, and outer shells consisting of electrons. Remember that the number of protons is always equal to the number of electrons.
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How would you compare the size of a nucleus to the size of an atom?
Small.
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What is the same about every atom in a given element?
Number of protons and electrons are the same.
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What is the mass and charge of a proton?
Mass: 1, Charge: +1
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What is the mass and charge of a neutron?
Mass: 1, Charge: 0
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What is the mass and charge of a electron?
Mass: 0, Charge: -1
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What is the atomic number?
Number of protons in the nucleus.
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What is the mass number?
Number of protons and neutrons in the nucleus.
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What is the relative atomic mass?
The mass compared to 1/12 the mass of carbon 12.
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How are elements arranged in the periodic table?
By atomic number.
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What is the name of the verticle column in a periodic table?
The group.
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What is the rule linking group number with number of electrons in the outer shell?
They're the same.
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What is the name of the horizontal row in the periodic table?
The Period.
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How many electrons does a group 1 element have in its outer shell?
2.
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How many electrons fit in the first shell?
1.
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How many electrons fit in the second shell?
8.
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Why do some elements in the periodic table have a decimal for their relative atomic mass?
Because they are made of isotopes.
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What is an isotope?
an isotope has the same atomic number, but a different mass number, it has the same number of protons and electrons but a different number of neutrons.
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Other cards in this set

Card 2

Front

What did Mendeleev create his periodic table for?

Back

To identify elements that had not been discovered, and their property's.

Card 3

Front

Why did it take such a long time for the world to learn about Mendeleev's periodic table?

Back

Preview of the front of card 3

Card 4

Front

What does an atom look like?

Back

Preview of the front of card 4

Card 5

Front

How would you compare the size of a nucleus to the size of an atom?

Back

Preview of the front of card 5
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