chemistry

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  • Created by: daria2004
  • Created on: 25-12-19 12:47
What order did Mendeleev place the elements in to form his first periodic table?
Mendeleev placed the elements in order of increasing atomic mass. An electron is a sub-atomic particle, with a negative charge.
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How are the elements arranged in the modern periodic table?
Increasing atomic number
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Why did Mendeleev leave gaps in his periodic table?
Because there were elements still to be discovered
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What is the electron arrangement of an element with an atomic number of 16?
2.8.6
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What name is given to the horizontal rows in the periodic table?
Periods
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Where is the element with the electron arrangement: 2.8.8.2 found in the periodic table?
The element is found in period 4 and group 2
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Which part of the atomic structure has most effect on the chemical properties and reactions of an element?
The outer electron shell
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Which atom will have similar chemical properties to the atom with: Atomic number = 12 Mass number = 24 Electronic configuration 2.8.2
The atom with: atomic number = 20, mass number = 42, electronic configuration 2.8.8.2 has similar reactions as it has the same number of outer electrons.
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What changes in atomic structure occur as you move from left to right along the horizontal rows in the periodic table?
The number of protons in the nucleus increases by one. The mass number usually increases as well but that depends on the number of neutrons, which can vary.
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Card 2

Front

How are the elements arranged in the modern periodic table?

Back

Increasing atomic number

Card 3

Front

Why did Mendeleev leave gaps in his periodic table?

Back

Preview of the front of card 3

Card 4

Front

What is the electron arrangement of an element with an atomic number of 16?

Back

Preview of the front of card 4

Card 5

Front

What name is given to the horizontal rows in the periodic table?

Back

Preview of the front of card 5
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Mendeleev arranged it in atomic weight not mass 

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