7503891
Question 1
Question
What are isotopes?
Answer
-
Different forms of the same element which have the same number of protons and a different number of neutrons.
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Different forms of the same element which have the same number of protons and a same number of neutrons.
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Different forms of the same element which have the different number of protons and a same number of neutrons.
Question 2
Question
what is ionic bonding?
Answer
-
transfer of electrons to form charged atoms
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Sharing electrons to form a full outer shell
Question 3
Question
Ionic compounds have a regular lattice structure.
Answer
- True
- False
Question 4
Question
Silver Chloride is soluble.
Answer
- True
- False
Question 5
Question
Tick all correct flame tests.
Answer
-
Sodium ions give an orange/yellow flame
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Sodium ions give an pink flame
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potassium ions give a red flame
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potassium give a lilac flame
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calcium ions give a blue flame
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Copper ions give a bluey-green flame
Question 6
Question
Barium sulfate, used in x-rays is swallowed by patients in barium meals. It is toxic.
Answer
- True
- False
Question 7
Question
How do you test for carbonates, for example Carbon dioxide?
Answer
-
Add dilute HCL and barium chloride solution. A white precipitate means Carbon dioxide is there.
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Bubble it through limewater, if it's carbon dioxide it will go cloudy.
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flame test it! If it turns white its Carbon dioxide
Question 8
Question
Simple molecular covalent substances have which of these characteristics?
Answer
-
Very strong covalent bonds form small molecules of two or more atoms.
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Very weak inter-molecular forces.
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High melting and boiling points.
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Conducts electricity.
Question 9
Question
Giant Molecular Covalent Substances have which of these characteristics, tick all the correct answers.
Answer
-
They're similar to ionic lattices.
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They're soluble in water.
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(except for graphite). Don't conduct electricity.
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Diamond and Graphite are main examples.
Question 10
Question
which process is better for separating miscible ( mixable) mixtures, separating funnels or fractional distillation?
Answer
-
Separating funnels.
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Fractional distillation.
Question 11
Question
Alkali metals ( in group one of the periodic table) have which properties?
Answer
-
react vigorously with water.
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The further you go down in the group, the more reactive they get.
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Reaction with water produces carbon dioxide
Question 12
Question
When bonds break they form an endothermic reaction.
Answer
- True
- False
Question 13
Question
Which four things can increase the rate of reaction?
Answer
-
Surface area
-
concentration
-
how heavy the object is
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a catalyst
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temperature
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covering it with a hat
Question 14
Question
select the correct answers.
Answer
-
The relative atomic mass is the same as the elements mass number.
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The relative atomic mass is the same as the elements atomic number
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Relative formula mass is all the relative atomic masses in that compound added together.
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