1863389
Descripción
Test por greenchloe1998, actualizado hace más de 1 año
|
|
Creado por greenchloe1998
hace casi 10 años
|
|
Pregunta 1
Pregunta
What are isotopes?
Respuesta
-
Different forms of the same element which have the same number of protons and a different number of neutrons.
-
Different forms of the same element which have the same number of protons and a same number of neutrons.
-
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
-
transfer of electrons to form charged atoms
-
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
-
Sodium ions give an pink flame
-
potassium ions give a red flame
-
potassium give a lilac flame
-
calcium ions give a blue flame
-
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
-
Add dilute HCL and barium chloride solution. A white precipitate means Carbon dioxide is there.
-
Bubble it through limewater, if it's carbon dioxide it will go cloudy.
-
flame test it! If it turns white its Carbon dioxide
Pregunta 8
Pregunta
Simple molecular covalent substances have which of these characteristics?
Respuesta
-
Very strong covalent bonds form small molecules of two or more atoms.
-
Very weak inter-molecular forces.
-
High melting and boiling points.
-
Conducts electricity.
Pregunta 9
Pregunta
Giant Molecular Covalent Substances have which of these characteristics, tick all the correct answers.
Respuesta
-
They're similar to ionic lattices.
-
They're soluble in water.
-
(except for graphite). Don't conduct electricity.
-
Diamond and Graphite are main examples.
Pregunta 10
Pregunta
which process is better for separating miscible ( mixable) mixtures, separating funnels or fractional distillation?
Respuesta
-
Separating funnels.
-
Fractional distillation.
Pregunta 11
Pregunta
Alkali metals ( in group one of the periodic table) have which properties?
Respuesta
-
react vigorously with water.
-
The further you go down in the group, the more reactive they get.
-
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
-
Surface area
-
concentration
-
how heavy the object is
-
a catalyst
-
temperature
-
covering it with a hat
Pregunta 14
Pregunta
select the correct answers.
Respuesta
-
The relative atomic mass is the same as the elements mass number.
-
The relative atomic mass is the same as the elements atomic number
-
Relative formula mass is all the relative atomic masses in that compound added together.
¿Quieres crear tus propios Tests gratis con GoConqr? Más información.