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