1517847
Descripción
Test por Rebecca Ryder, actualizado hace más de 1 año
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Creado por Rebecca Ryder
hace más de 9 años
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Pregunta 1
Pregunta
What is the charge and mass of an electron
Respuesta
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charge=+1 mass=1
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charge=-1 mass=1
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charge=-1 mass=1/2000
Pregunta 2
Pregunta
Which ones are the correct state symbols?
Respuesta
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Solid - s
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Liquid - lq
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Gas - g
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Aqueous - a
Pregunta 3
Pregunta
What do ionic bonds form?
Respuesta
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Ion
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Element
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Compound
Pregunta 4
Pregunta
What happens to electrons in ionic bonding?
Respuesta
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a metal loses electron(s) and a non-metal gains electron(s).
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a metal gains electron(s) and a non-metal loses electron(s).
Pregunta 5
Pregunta
In ionic bonding, which charged particles attract?
Respuesta
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positive with positive
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negative with negative
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positive with negative
Pregunta 6
Pregunta
What are the correct properties of giant ionic compounds?
Respuesta
-
it conducts as a liquid and as a solid as the electrons are free to move
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they are very brittle and break when hit
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they have extremely low melting points due to lots of bonds
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they are soluble in water
Pregunta 7
Pregunta
NH3 is ammonia
Respuesta
- True
- False
Pregunta 8
Pregunta
compounds such as carbon dioxide (CO2), chlorine (Cl2) and water (H2O) are called simpelr molecular compounds.
Respuesta
- True
- False
Pregunta 9
Pregunta
what are the correct properties of a simple covalent compounds
Respuesta
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low melting point
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strong covalent bonds between atoms
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strong intermolecular forces
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doesn't take a lot of energy to break the bonds
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not usually a gas
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no electrical conductivity
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doesn't conduct as a solid or liquid but does conduct as a gas
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there are no charged particles
Pregunta 10
Pregunta
Diamond is made up of carbon atoms. Each carbon atom has four strong bonds and is very hard.
Respuesta
- True
- False
Pregunta 11
Pregunta
diamond is a simple covalent structure
Respuesta
- True
- False
Pregunta 12
Pregunta
Does diamond have a low or high melting point?
Respuesta
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Low melting point
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High melting point
Pregunta 13
Pregunta
diamond can conduct electricity
Respuesta
- True
- False
Pregunta 14
Pregunta
Tick the correct statements in reference to Graphite
Respuesta
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made up of carbon atoms
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has 5 strong bonds
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atoms form layers
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contains delocalised electrons
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the delocalised electrons are not free to move
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cannot conduct electricity
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layers can slide over each other
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graphite is soft
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low melting point
Pregunta 15
Pregunta
metals are soft and malleable
Respuesta
- True
- False
Pregunta 16
Pregunta
metals are weak
Respuesta
- True
- False
Pregunta 17
Pregunta
they are good conductors of electricity
Respuesta
- True
- False
Pregunta 18
Pregunta
they are poor conductors of heat
Respuesta
- True
- False
Pregunta 19
Pregunta
what is an alloy?
Respuesta
-
a pure metal
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a mixture of metals
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a mixture of metals and non-metals
Pregunta 20
Pregunta
a metallic bond is the bonding of the free electrons in metals.
Respuesta
- True
- False
Pregunta 21
Pregunta
the attraction is between neutral metal ions and delocalised electrons
Respuesta
- True
- False
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