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22 Cards in this Set
- Front
- Back
Define 'atom'
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The smallest, indivisible part of an element.
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Define 'molecule'
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Two or more of the same element bonded together
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Define 'compound'
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Two or more different types of elements bonded together
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Define 'mixture'
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Two or more different types of elements but not bonded together
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Give the mass and charge for
Protons Neutrons Electrons |
Protons - 1 - positive
Neutrons - 1 - neutral Electrons - 1/2500 - negative |
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Define 'atomic number'
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The number of protons in an element
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Define 'mass number'
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The number of protons minus the number of neutrons
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How is the periodic table arranged?
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In ascending order of atomic number
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Define 'group number'
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The number of electrons in the outer shell
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Define 'period number'
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The number of shells
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Why do elements in the same group act similarly?
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They have the same number of outer shell electrons which determines it's chemical properties
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Are metal oxides acidic or basic?
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Basic
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Are non-metal oxides acidic or basic?
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Acidic
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Why are Group 0/8 elements unreactive?
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They have full outer shells
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Name four things that all group 1 elements do in water
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Bubble
Move on surface Float Reduce in size |
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What happens when sodium reacts with water that doesnt happen with lithium?
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Melts into ball
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What happens when potassium reacts with water that doesn't happen with lithium and sodium?
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Produce coloured flame
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Why does the reactivity increase down Group 1?
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The outer shell electrons are further away from the nucleus
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Give the flame colours of;
Lithium Sodium Potassium Calcium |
Lithium; Red
Sodium; Yellow Potassium; Lilac Calcium; Brick red |
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Give the chemical equation for the thermal decomposition of copper (ii) carbonate
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CuCO3 -> CuO + CO2
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Give the precipitate colour of the following metals when reacted with sodium hydroxide.
Fe(2+) Fe(3+) Cu(2+) |
Fe(2+); Pale green to dirty green
Fe(3+); Orange to browny red Cu(2+); Blue to blue |
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Give the chemical equation for the reaction of iron (ii) and sodium hydroxide.
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Fe(2+) + 2OH -> Fe(OH)[2]
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