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bonding

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What do all elements in the same row of the periodic table have in common?
They have the same number of shells of electrons.
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What do all elements in the same column of the periodic table have in common?
They have the same number of electrons in their outer shell(and therefore have similar chemical properties).
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Lithium has a mass number of 7 and an atomic number of 3; work out the number of protons, neutrons and electrons present.
3 protons, 3 electrons and 4 neutrons.
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What is an isotope?
Two or more atoms of the same element (the same number of protons) but with a different number of neutrons
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What are the maximum numbers of electrons that can be presented in the first 3 electron shells of an atom?
1st shell=2 2nd shell=8 3rd shell=8
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What is the electronic configuration of silicon (atomic number 14)?
2,8,4
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What is the electronic configuration of calcium (atomic number 20)?
2,8,8,2
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Why are some atomic masses not whole numbers?
Some naturally occurring elements are made up of 2 or more isotopes so their relative atomic
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Why do atoms join together to form compounds?
To get a full outer shell.
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How is sodium chloride formed?
The sodium atom transfers its outer shell to the chlorine atom, producing a pair of oppositely charged ions that stick together by electrostatic attraction.
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Describe an ionic bond.
A metal looses electron(s) to a non-metal. This results in the metal becoming a positively charged ion and the non-metal a negatively charged ion. These oppositely charged ions then attract.
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Name 3 types of bonding.
Ionic, covalent, metallic
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Other cards in this set

Card 2

Front

What do all elements in the same column of the periodic table have in common?

Back

They have the same number of electrons in their outer shell(and therefore have similar chemical properties).

Card 3

Front

Lithium has a mass number of 7 and an atomic number of 3; work out the number of protons, neutrons and electrons present.

Back

Preview of the front of card 3

Card 4

Front

What is an isotope?

Back

Preview of the front of card 4

Card 5

Front

What are the maximum numbers of electrons that can be presented in the first 3 electron shells of an atom?

Back

Preview of the front of card 5
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