Chemistry 2

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What is an atom?
An atom consists of protons, neutrons and electrons.
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What is a compound?
A compound is when atoms of 2 or more elements are chemically combined together.
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What is an isotope?
Isotopes are different atomic forms of the same element, which have the same number of protons but a different amount of neutrons. (Same atomic number but different mass numbers.)
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What is ionic bonding?
Ionic bonding is when atoms lose or gain electrons to become charged particles which are then strongly attracted to one another.
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If an element on the left-hand side of the periodic table lost 1 or 2 electrons, what charge would it have?
Positive.
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If an element in group 6 or 7 gained 1 or 2 electrons, what charge would it have?
Negative.
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What do ionic compounds always have?
They always have a giant regular lattice structure.
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What do the oppositely charged ions cause?
They cause a very strong electrostatic attraction in all directions.
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Name one property that all ionic compounds have.(heat)
They all have high melting points and high boiling points. It takes a large amount of energy to overcome the attration that the ions have.
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How can you get an ionic compound to carry an electric current?
By melting it or by dissolving it in water as this separates the ions and making them free to move.
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What kind of electronic structure are ionic compounds compared to?
A noble gases' electronic structure.
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Which groups of elements are most likely to make ionic compounds?
Group 1, 2, 6 and 7
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What other group does group 1 use to form a ionic compound?
Group 7
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What other group does group 6 use to form a ionic compound?
Group 2
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What is the overall charge on an ionic compound?
Zero
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When do the positive and negative charges only appear?
When the element has reacted with something.
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What is covalent bonding?
Covalent bonding is when atoms share electrons with each other yo have full outer shells.
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In which shell can covalent bonding only happen?
They only share electrons in their outer shell (highest energy levels).
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What does each covalent bond provide for each atom?
It provides an extra shared electron for each atom. So a covalent bond is a pair of shared electrons.
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How many covalent bonds can an atom have?
The atom can have as many as it wants as long as it fills up the outer shell. However a double covalent bond can be formed like in oxygen.
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What are the two types of covalent bonds?
There are simple molecules or giant structures.
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Other cards in this set

Card 2

Front

What is a compound?

Back

A compound is when atoms of 2 or more elements are chemically combined together.

Card 3

Front

What is an isotope?

Back

Preview of the front of card 3

Card 4

Front

What is ionic bonding?

Back

Preview of the front of card 4

Card 5

Front

If an element on the left-hand side of the periodic table lost 1 or 2 electrons, what charge would it have?

Back

Preview of the front of card 5
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