1007081
Descripción
Test por Nicole Saville, actualizado hace más de 1 año
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Creado por Nicole Saville
hace casi 10 años
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Pregunta 1
Pregunta
What do ionic bonds form between?
Respuesta
-
Metals and metals
-
Metals and non-metals
-
Halogens and alkali metals
-
Carbon atoms
Pregunta 2
Pregunta
What is ionic bonding?
Respuesta
-
The transfer of electrons between atoms in order to become stable
-
A shared pair of electrons
-
Strong electrostatic forces of attraction between positive ions and a sea of de-localised electrons
Pregunta 3
Pregunta
What happens to metal atoms during ionic bonding?
Respuesta
-
They lose electrons
-
The gain electrons
-
They pair up
-
They are not involved in ionic bonding
Pregunta 4
Pregunta
What happens if an atom gains electrons?
Respuesta
-
A positive ion is formed
-
A negative ion is formed
-
oxidation
Pregunta 5
Pregunta
During the bonding of magnesium oxide:
Respuesta
-
Magnesium atoms lose electrons to become Mg-
-
Magnesium atoms lose electrons to become Mg2+
-
Magnesium atoms gain an electron to become Mg
-
Oxygen atoms gain electrons to become O2-
-
Oxygen atoms lose electrons to become O+
Pregunta 6
Pregunta
What are positive ions and negative ions held together by?
Respuesta
-
Glue
-
Weight
-
Attraction
-
Love
Pregunta 7
Pregunta
A sodium atoms only has one electron to lose but an oxygen atom needs to gain two electrons, what happens?
Respuesta
-
They compromise and sodium gives one and a half electrons to oxygen
-
Two sodium atoms bond with one oxygen atom
-
Two oxygen atoms bond with one sodium atom
Pregunta 8
Pregunta
What is the structure of Sodium Chloride?
Respuesta
-
Covalent lattice
-
Giant ionic lattice
-
Ionic sphere
Pregunta 9
Pregunta
When can sodium chloride conduct electricity?
Respuesta
-
In a solution
-
When it's molten
-
When it's a solid
-
When its extremely cold
Pregunta 10
Pregunta
Sodium chloride and magnesium oxide have:
Respuesta
-
High melting points
-
Low boiling points
-
Strong electrostatic attractions between ions
-
weak intermolecular forces
Pregunta 11
Pregunta
The melting point of MgO is higher than NaCl because magnesium ions are smaller so they can get closer to oxygen ions, making the bond stronger therefore more energy is needed to break the bonds.
Respuesta
- True
- False
Pregunta 12
Pregunta
Covalent bonding occurs between...
Respuesta
-
Non-metals and non-metals
-
Metals and metals
-
Metals and non-metals
Pregunta 13
Pregunta
What is covalent bonding?
Respuesta
-
A shared pair of electrons between atoms
-
The donation of electrons from one atom to another
-
Ions which are held together by attraction
Pregunta 14
Pregunta
What substances have low melting points due to their simple molecular structure?
Respuesta
-
Sodium chloride
-
Carbon dioxide
-
Water
-
Graphite
Pregunta 15
Pregunta
Why does carbon dioxide not conduct electricity?
Respuesta
-
There are no free electrons
-
It's not a metal and only metals conduct electricity
-
It's not a solid and only solids conduct electricity
Pregunta 16
Pregunta
Who arranged the elements in order in a table and left gaps where he thought new elements would be found?
Respuesta
-
Mendeleev
-
Newlands
-
Bohr
Pregunta 17
Pregunta
What are the properties of alkali metals (group 1 elements)
Respuesta
-
They react vigorously with water
-
The metal reacts with water to make a metal hydroxide
-
When they react with water hydrogen is given off
Pregunta 18
Pregunta
As you go down group 1...
Respuesta
-
reactivity increases
-
melting point increases
-
melting point decreases
-
reactivity decreases
-
density increases
-
They become harder
-
they become softer
Pregunta 19
Pregunta
If electrons are lost, the process is called...
Respuesta
-
reduction
-
oxidation
-
displacement
-
saponification
Pregunta 20
Pregunta
What's the first step to carrying out a flame test?
Respuesta
-
The flame wire is moistened in dilute hydrochloric acid
-
The flame test wire is dipped into the solid chemical
-
Lithium, potassium or sodium are burnt
Pregunta 21
Pregunta
If the flame burns red, what element is present?
Respuesta
-
Lithium
-
Potassium
-
Sodium
-
Rubidium
Pregunta 22
Pregunta
If potassium is present in a compound, what colour will the flame burn?
Respuesta
-
red
-
lilac
-
yellow
-
orange
Pregunta 23
Pregunta
What colour and state is bromine at room temperature and what can it be used for?
Respuesta
-
Orange
-
Black
-
Colourless
-
Solid
-
Liquid
-
Used in fire extinguishers and plastics
-
Used in cooking
-
Used as a disinfectant
Pregunta 24
Pregunta
The reactivity of halogens increases as you go down group 7
Respuesta
- True
- False
Pregunta 25
Pregunta
If a halogen is bubbled through a solution of a metal halide, what are the two possible outcome?
Respuesta
-
A displacement reaction
-
No reaction
-
A redox reaction
-
A precipitate reaction
Pregunta 26
Pregunta
What colours are these transition metal compounds?
Respuesta
-
Copper compounds are often blue Iron (II) compounds are often grey Iron (III) compounds are often green
-
Copper compounds are often orange Iron (II) compounds are often brown Iron (III) compounds are often blue/grey
-
Copper compounds are often blue Iron (II) compounds are often green Iron (III) compounds are often orange/brown
Pregunta 27
Pregunta
Transition metals can often be used as catalysts, e.g....
Respuesta
-
Nickel in the manufacture of margarine
-
Iron in the haber process
-
Yeast in fermentation
-
Tin in the contact process
Pregunta 28
Pregunta
If a transition metal carbonate is heated, it undergoes thermal decomposition and forms what?
Respuesta
-
Metal oxide + carbon dioxide
-
Metal halide + water
-
Metal hydroxide + water
Pregunta 29
Pregunta
Sodium hydroxide solution reacts with compounds of each transition metal to make a solid of a particular colour. What is the name of this type of reaction?
Respuesta
-
Precipitation
-
Thermal decomposition
-
Displacement
-
Redox
Pregunta 30
Pregunta
What colour is the precipitate formed by sodium hydroxide and iron(III)?
Respuesta
-
A blue solid
-
A green gelatinous solid
-
An orange/brown gelatinous soild
-
A grey/white solid
Pregunta 31
Pregunta
What are the physical properties of metals?
Respuesta
-
Ductile
-
Malleable
-
Sonorous
-
Good thermal conductors
-
Poor electrical conductors
Pregunta 32
Pregunta
Metals have high melting and boiling points due to their strong metallic bonds
Respuesta
- True
- False
Pregunta 33
Pregunta
What's a metallic bond?
Respuesta
-
A strong force of electrostatic attraction between close-packed positive ions and a sea of de-localised electrons
-
A shared pair of electrons
-
When to metals are melted together
Pregunta 34
Pregunta
Why do metals conduct electricity?
Respuesta
-
The delocalised electrons can move easily and create a current
-
The positive ions can move around
Pregunta 35
Pregunta
What's a superconductor?
Respuesta
-
A material that conducts electricity with little or no resistance
-
A material that conducts electricity at very high temperatures
-
A material that can conduct electricity in space
Pregunta 36
Pregunta
What are the benefits of super conductors?
Respuesta
-
Loss-free power transmittion
-
Super-fast electronic circuits
-
powerful electromagents
-
They're cheap to make
Pregunta 37
Pregunta
What is sedimentation?
Respuesta
-
chemicals are added to make solid particles and bacteria settle out
-
sediment is added to water
-
Water is passed through sand to get rid of fine particles
Pregunta 38
Pregunta
Filtration of water is when a layer of sand on gravel filters out the remaining fine particles
Respuesta
- True
- False
Pregunta 39
Pregunta
What does chlorination do?
Respuesta
-
Kills microbes
-
Changes the taste of the water
-
Adds chlorine for nutritional value
Pregunta 40
Pregunta
Barium chloride + magnesium sulphate -->
Respuesta
-
Barium sulphate (white precipitate) + magnesium chloride
-
Barium sulphate (yellow precipitate) + sodium chloride
-
Barium chloride (white precipitate) + magnesium + carbon dioxide
-
Barium sulphate (yellow precipitate) + magnesium chloride
Pregunta 41
Pregunta
What chemical can be used to test water?
Respuesta
-
silver hydroxide
-
silver nitrate
-
Copper nitrate
-
copper carbonate
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