Atomic Structure and The Periodic Table

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What charge does the nucleus have?
Positive- protons are positive and neutrons and neutral
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What are the trends in Group 0?
Low boiling points, becoming higher down the group; low densities, increase down the group
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What charge do electrons carry?
Negative
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What colour flame does Lithium burn with?
Red
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What colour flame does Potassium burn with?
Lilac
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What colour flame does Sodium burn with?
Orange
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Name two people who were involved in the development of the Periodic Table?
Newland and Mendeleev
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What did Newland call his groups?
Octaves
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How was Mendeleev's table of elements different from previous efforts?
He left gaps and predicted new elements
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What is the maximum number of electrons allowed in the first four shells?
2, 8, 8, 18
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What do elements in the same group have in common?
They react in similar ways as they have the same amount of electrons in the outer shell.
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Why don't Group 0 elements react?
They have full outer shells
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Why are the elements in Group 1 so reactive?
They only have one electron in their outer shell and they want to get rid of it.
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What kind of ions do Group 1 elements make?
1+
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What is ionic bonding?
The transfer of electrons from one element to another, causing a difference in charges and an attraction
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What are Group 1 elements also known as?
Alkali metals
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What are Group 7 elements also known as?
Halogens
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As you move down Group 1, what patterns can you see?
Element become more reactive, have a higher density, have lower melting and boiling points.
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What happens when Group 1 metals are put in water?
They react vigorously- Lithium and Sodium fizz a lot and move freely around the container, the same with Potassium but has a flame; Hydrogen is formed.
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What is a displacement reaction?
When a more reactive element 'pushes out' a less reactive element from a compound
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As you move down Group 7, what patterns can you see?
Elements become less reactive, they get higher melting and boiling points
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Why do Group 7 elements get less reactive down the group?
The outer electrons are further away from the nucleus, so additional electrons are attracted weaker.
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What is an isotope?
A different atomic form of the same element which have the same amount of protons but a different number of neutrons.
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What are the common properties of transition metals?
Form coloured compounds; good conductors of heat and electricity; malleable; less reactive than alkali metals; high melting points; strong; high densities; useful as catalysts
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Other cards in this set

Card 2

Front

What are the trends in Group 0?

Back

Low boiling points, becoming higher down the group; low densities, increase down the group

Card 3

Front

What charge do electrons carry?

Back

Preview of the front of card 3

Card 4

Front

What colour flame does Lithium burn with?

Back

Preview of the front of card 4

Card 5

Front

What colour flame does Potassium burn with?

Back

Preview of the front of card 5
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