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year 9 Science Homework Week 5
By Naomi Arthur
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Last updated over 4 years ago
22 questions
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Pure metals are…
Malleable and hard
Inflexible and very soft
Malleable and very soft
Inflexible and hard
What is an alloy?
A solid mixture containing at least one metal
A solid mixture containing at least one non-metal
A solid mixture containing at least two metal
A solid mixture containing at least one metal and one non-metal
Compared to iron, steel is…
More malleable and stronger
Less malleable and weaker
More malleable and weaker
Less malleable and stronger
Which of these is an alloy?
Iron
Gold
Steel
Which of these is not an alloy?
Steel
Zinc
Bronze
How are atoms arranged in a pure metal?
Regular lattice
Irregular
Randomly with space between particles
D.Which of these is an alloy?
Substance containing oxygen and carbon
Substance containing platinum
Substance containing tin and copper
Which is most malleable?
Iron
Steel
Bronze
Which is strongest?
Iron
Steel
Zinc
What is bronze an alloy of?
Copper and gold
Copper and tin
Tin and gold
What is brass an alloy of?
Copper and zinc
Copper and tin
Tin and zinc
What is the gold used in jewellery commonly alloyed with?
Copper, tin and silver
Copper, zinc and tin
Copper, zinc and silver
What group on the periodic table are the alkali metals?
1
2
7
How does the atomic radius change going down the group?
Decreases
Stays the same
Increases
Which alkali metal has the largest atomic radius?
Lithium
Caesium
Francium
Which is the least reactive?
Lithium
Caesium
Sodium
Which is the least reactive?
Potassium
Caesium
Sodium
Which subatomic particle gives the nucleus a positive charge?
Electron
Neutron
Proton
What is the force called that holds the outer electron near the nucleus?
Electrostatic gravity
Electrostatic attraction
Electrostatic repulsion
Why is the electrostatic attraction weaker in potassium than lithium?
Potassium has a larger atomic radius
Lithium has a larger atomic radius
Lithium is bigger
Which is the product in the reaction of an alkali metal and oxygen?
Metal hydroxide
Metal oxide
Metal oxide + hydrogen
Metal hydroxide + hydrogen
Which is the product in the reaction of an alkali metal and water?
Metal hydroxide
Metal oxide
Metal oxide + hydrogen
Metal hydroxide + hydrogen