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32 Cards in this Set
- Front
- Back
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Plum pudding model |
Mass of positive charge Negative electrons |
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Scattering experiment |
Fire positive alpha charges at a very thin set of gold Some were deflected back Meant plum pudding was wrong |
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Nuclear model |
Positive nucleus Negative electrons surround the nucleus Most of the atom is empty space |
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Bohr’s nuclear model |
Added shells |
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Mendeleev periodic table |
Mainly in order of atomic mass Gaps for similar elements stayed in the same group Some gaps for unknown elements |
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Group 1 metals are known as what? |
Alkali metals |
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What are the alkali metals? |
Lithium Potassium Rubidium Caesium Francium |
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What are group 1 metals like? |
Reactive, soft Have one electron on their outer shell Very reactive Low density |
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What happens has you go down group one? |
Increasing reactivity Lower melting boiling points Higher relative atomic mass |
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What do alkali metals always react to form? |
Ionic compounds with non-metals |
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What happens when group one metals react with water? |
They produce hydrogen Very violent |
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What happens when you react with chlorine |
Produces a salt |
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What happens when group one react with oxygen? |
Form metal oxides |
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What is ionic bonding? |
When a metal and non-metal react |
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Properties of ionic compounds |
Regular lattice High melting and boiling points Strong electrostatic forces between opposite charges ions |
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How can ionic compounds conduct electricity? |
As a liquid |
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What’s covalent bonding? |
Two non-metals that share electrons |
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Giant covalent structure properties |
High melting and boiling points Don’t conduct electricity Strong covalent bonds |
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What’s metallic bonding? |
Metals bonding together |
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Concentration= |
Mass/volume |
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pH of acids |
0-6 |
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pH of alkalis |
8-14 |
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What’s a base? |
a substance with a pH greater than 7 |
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What are group 7 known as? |
Halogens |
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What are the names of the halogens called? |
Fluorine Chlorine Bromine Iodine |
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What happens as you go down group 7? |
Less reactive High melting and boiling point Higher relative atomic mass |
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What do halogens form? |
Molecular compounds |
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What can halogens also form? |
Ionic bonds with metals |
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Are halogens metal or non-metals? |
non-metals |
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What are group 0? |
noble gases |
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Are noble gases reactive? |
No |
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How are ions made? |
When electrons are transferred |
