What is the difference between a mixture and a compound?
A mixture is when elements are mixed but not joined. They can be separated easily. A compound is when elements are chemically joined. it is not easy to separate a compound.
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Which group number are the Alkali metals? How reactive are they?
The Alkali metals are group one. They get more reactive as you go down the group with Francium being the most reactive.
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What is the solute in an experiment?
The solute is the substance that is being dissolved.
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What is the solvent?
The solvent is the substance that the solute is being dissolved in.
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What is the name of group 7?
Group 7 is the halogens.
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What is the solution in an experiment?
The solution is the mixture formed when the solute dissolves in the solvent.
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Which group is very nonreactive, what is their number?
The noble gases are very nonreactive. They are group 8/0.
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What can be used to test for hydrogen *gas*? How will you know that it is present?
A burning splint (it will burn with a squeaky pop).
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What can be used to test for the presence of carob dioxide gas? How will you know that it is present?
Lime water can be used. It will turn a milky white colour if CO2 is present.
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What can be used to test for the presence of water?
Cobalt chloride paper can be used (it will change from blue ➡️ Pink in the presence of water because it detects the hydrogen)
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What does the zig zag line of the periodic table tell you?
The elements on the left of the line are metals, the ones of the right are non-metals.
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What do elements in the same group have?
Similar chemical properties and the same number of outer electrons.
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How do you find out how many electrons are in the outer electron shell?
The valency number.
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What is the maximum number of electrons that can be in the first energy level?
2.
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What is the maximum number of electrons that can be in the second and higher energy levels?
8.
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How do you find the number of electrons in an element?
The number of electrons is the same as the number of protons (AKA the atomic number.)
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ere can you find the electron arrangements for the first 88 elements?
On page six of the N5 Chemistry data booklet.
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In what state does the periodic table display elements?
It shows how the elements are at room temperature.
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