C9 Metals

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Test your knowledge on metals, their properties, uses, and alloys in this fun quiz game!

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Vivian Wang Hsu

Costa Rica

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C9 Metals


Froggy Jumps C9 MetalsOnline version Test your knowledge on metals, their properties, uses, and alloys in this fun quiz game! by Vivian Wang Hsu 1 Why do metals tend to be good conductors of heat and electricity? a Contain delocalized electrons b Strong electrostatic attraction between positive metal ions and negative metal ions c Because they are malleable 2 What answer has two correct physical properties of metals? a High densities and low melting points b Malleable and have high melting points c Are liquids at roo and high boiling points 3 Why do metals have high melting points and boiling points? a Atoms are held together by a strong force of gravity, which requires a lot of energy to overcome b Positive metal ions are arranged in layers so are able to slide over one another c Strong electrostatic attraction between the positive metal ions and the negative electrons 4 Metal + acid = a Salt + water b Salt + water + carbon dioxide c Salt + hydrogen 5 What property allows metals to be drawn into wires? a Brittleness b Ductility c Hardness 6 All metal elements conduct electricity when a Solid b Liquid c In a gas state 7 Which metal is usually used in electrical wiring/circuits? a Steel b Copper c Iron 8 Metal atoms a Gain electrons in chemical reactions b Lose electrons in chemical reactions c Do not gain electrons in chemical reactions 9 When a metal reacts with cold water: a It forms a metal hydroxide and hydrogen gas b It forms a metal carbonate and hydrogen gas c It forms a metal oxide and carbon dioxide 10 In a reaction with dilute acid, zinc + hydrochloric acid = a Zinc sulfate + hydrogen gas b Zinc chloride + oxygen gas c Zinc chloride + hydrogen gas 11 In a reaction with cold water, what is the balanced equation for sodium + water? a 2Na + 2H2O = 2NaOH + H2 b Na + H2O = NaOH + H2 c 2Na + 2H2O = 2NaOH + H2 12 What products are formed when metal reacts with steam? a Metal hydroxide + hydrogen gas b Metal oxide + hydrogen gas c Metal oxide + oxygen gas 13 When magnesium reacts with steam, what are the correct products? a Magnesium oxide + hydrogen b Magnesium hydroxide + oxygen c Magnesium sulfate + hydrogen 14 What are 3 correct useful properties of aluminium a Strong and does not bend, highly magnetic, poor conductor of electricity b High density, highly reactive with water at room temperature, and corrodes easily c Low density, good electrical conductivity and is corrosion resistant 15 Aluminum’s low density makes it an ideal material for a Heavy machinery to increase strength and weight b The manufacture of aircraft c Construction of underground structures for added stability 16 Aluminum’s good electrical conductivity is used in a The manufacture of overhead cables b High-temperature electrical heating elements where high resistance is required to generate heat c Insulation of electrical wires 17 Why does aluminum’s resistance to corrosion make it an ideal material for storing food and drinks? a It will not affect the taste b Keeps food and drinks fresh forever c It prevents any bacteria from growing inside 18 Pure copper’s high conductivity is not safe because it overheats wires a False b True c 19 Why are metallic elements malleable? a Their protons are delocalized and are therefore free to move b Their negative ions are arranged in layers which can slide easily past each other c Their atoms are arranged in layers which can slide easily past each other 20 What are alloys? a A mixture of a metal with other elements b Metals that are completely pure and not mixed with any other substances c Metals made to be completely indestructible 21 What is brass a mixture of? a Copper and aluminum b Copper and zinc c Zinc and lead 22 What is stainless steel a mixture of? a Iron and other elements like chromium, nickel, and carbon b Aluminum, copper, and iron c Iron, lead, and steel 23 Are alloys stronger and harder than pure metals or weaker and softer? a Stronger and harder b Weaker and softer c 24 Are alloys more useful or less useful than pure metals? a Less useful b More useful c Both are the same 25 Alloys can be used to make a variety of tools, due to: a They are always lightweight and never break b They are completely flexible and can bend into any shape c Their hardness and resistance to corrosion/rusting 26 What is corrosion? a The destruction of materials by chemical reactions with substances in the environment b When metals become stronger and more durable over time c The process of turning metals into a powder for easy disposal 27 What material is used to make cutlery and why? a Aluminum because it is resistant to corrosion and doesn’t rust b Stainless steel because it is resistant to rusting and has greater hardness than pure iron c Copper because it’s has good electrical conductivity and is more lightweight 28 How is the structure of a pure metal? a Atoms are arranged in a random pattern b Has neat layers of identically-sized metal atoms c Composed of separate, floating molecules that don’t bond together 29 How is the structure of an alloy? a Perfect, uniform arrangement of identical atoms just like a pure metal b Made up of separate, non-bonded chunks of different metals that sit next to each other c Atoms of two different sizes packed together to form an irregular arrangement. Layers distorted 30 Which diagram is the correct representation of an alloy in its solid state? a A b B c C 31 Why can alloys be harder and stronger than pure metals? a Because the different metals in alloys naturally flow apart, making them more rigid b Because the same sized metal atoms allow the layers to be able to slide over each other c Because the different sized atoms in alloys mean the layers are unable to slide over each other

C9 Metals

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C9 MetalsOnline version

by Vivian Wang Hsu

Why do metals tend to be good conductors of heat and electricity?

What answer has two correct physical properties of metals?

Why do metals have high melting points and boiling points?

Metal + acid =

What property allows metals to be drawn into wires?

All metal elements conduct electricity when

Which metal is usually used in electrical wiring/circuits?

Metal atoms

When a metal reacts with cold water:

In a reaction with dilute acid, zinc + hydrochloric acid =

In a reaction with cold water, what is the balanced equation for sodium + water?

What products are formed when metal reacts with steam?

When magnesium reacts with steam, what are the correct products?

What are 3 correct useful properties of aluminium

Aluminum’s low density makes it an ideal material for

Aluminum’s good electrical conductivity is used in

Why does aluminum’s resistance to corrosion make it an ideal material for storing food and drinks?

Pure copper’s high conductivity is not safe because it overheats wires

Why are metallic elements malleable?

What are alloys?

What is brass a mixture of?

What is stainless steel a mixture of?

Are alloys stronger and harder than pure metals or weaker and softer?

Are alloys more useful or less useful than pure metals?

Alloys can be used to make a variety of tools, due to:

What is corrosion?

What material is used to make cutlery and why?

How is the structure of a pure metal?

How is the structure of an alloy?

Which diagram is the correct representation of an alloy in its solid state?

Why can alloys be harder and stronger than pure metals?