1863389
Descrição
Quiz por greenchloe1998, atualizado more than 1 year ago
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Criado por greenchloe1998
quase 10 anos atrás
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Questão 1
Questão
What are isotopes?
Responda
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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.
Questão 2
Questão
what is ionic bonding?
Responda
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transfer of electrons to form charged atoms
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Sharing electrons to form a full outer shell
Questão 3
Questão
Ionic compounds have a regular lattice structure.
Responda
- True
- False
Questão 4
Questão
Silver Chloride is soluble.
Responda
- True
- False
Questão 5
Questão
Tick all correct flame tests.
Responda
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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
Questão 6
Questão
Barium sulfate, used in x-rays is swallowed by patients in barium meals. It is toxic.
Responda
- True
- False
Questão 7
Questão
How do you test for carbonates, for example Carbon dioxide?
Responda
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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
Questão 8
Questão
Simple molecular covalent substances have which of these characteristics?
Responda
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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.
Questão 9
Questão
Giant Molecular Covalent Substances have which of these characteristics, tick all the correct answers.
Responda
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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.
Questão 10
Questão
which process is better for separating miscible ( mixable) mixtures, separating funnels or fractional distillation?
Responda
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Separating funnels.
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Fractional distillation.
Questão 11
Questão
Alkali metals ( in group one of the periodic table) have which properties?
Responda
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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
Questão 12
Questão
When bonds break they form an endothermic reaction.
Responda
- True
- False
Questão 13
Questão
Which four things can increase the rate of reaction?
Responda
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Surface area
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concentration
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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
Questão 14
Questão
select the correct answers.
Responda
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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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