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34 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is an alloy?
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A mixture of two or more metals or a metal with a non-metal
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m+m or m+nm
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Give 6 physical properties of metals.
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- Good conductors of electricity
- Good conductors of Heat - Malleable (can be hammered into different shapes - Ductile (can be drawn into wires) - Lustrous (has a shiny surface when polished) - Sonorous (makes a ringing sound when hit with a hard object) |
1- lightning 2- Lava 3- Thor 4- fantastic four stretch man 5- bright 6- Bell |
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Why are metals turned into alloys?
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- improve strength,
- hardness or, - resistance to corrosion |
h______s s______g c________n |
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Give 6 chemical properties of metals.
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- Many metal oxides are basic - Many non-metal oxides are acidic - Many metals react with oxygen to give off H² gas - Most non-metals do not react with acids - When they react, metals form positive ions by losing electrons - When they react, non-metals form negative ions by gaining electrons. (exception: hydrogen can form positive ions.) |
-many metal oxides .... -many non-metal oxides are..... - many metals react with.... to give off..... |
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Why are metals malleable and ductile? |
The atoms in a pure metal are arranged in regular layers, so when a force is applied, the layers slide over each other. |
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Why are alloys stronger and harder then pure metal? |
When a metal is alloyed with a second metal, the different sized metal atoms make the arrangement of the lattice less regular. We say that they disrupt the crystal lattice. This stops the layers of metal atoms from sliding easily over each other when a force is applied. This is why an alloy is stronger and harder than a pure metal. |
crystal lattice
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Name 3 alloys and the metals used. |
1- Brass ( copper + zinc) 2- Bronze ( copper + tin) 3- stainless steel (nickle + chromium + iron) |
B,B,SS |
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Give the properties of brass, bronze and stainless steel |
Brass: Stronger then copper but still malleable
Bronze: Very hard Stainless steel: Does not rust like iron |
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Specify some uses for Brass, Bronze and Stainless Steel. |
Brass- Musical instruments, ornaments Bronze- Some Moving parts of machines, Statues, bells Stainless Steel- car parts, cutlery, surgical instruments |
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Name two alloys with 'memory' properties, and name their general name. |
Titanium and Nickle General Name: 'Shape memory alloys' |
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What is the metals reactivity series 'mnemonic' ?
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Pop Stars Can Make Absolute Zillions If Tiny Little Hydrogen Children Mercury Spend Good Pennies. |
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When metals react with oxygen they form? |
Metal oxides |
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What happens with Copper, Iron, Gold and magnesium when they react with oxygen? |
Copper: Does not burn, but turns black on its surface.
Iron: Only burns in powder form or as iron wool. Gold: Does not burn at all. Magnesium: Burns rapidly with a bright white light. |
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True or False: If a metal does not react with water, then it cannot react with steam. |
False
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What do metals form when they react with water?
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Metal Hydroxide + Hydrogen
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What do metals form when they react with steam?
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Metal Oxide + Hydrogen
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What happens to Calcium, Copper, Magnesium, Sodium and Zinc when they react with water or steam?
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Calcium: Reacts rapidly with water
Copper: No reaction with both Magnesium: Reacts very slowly with water but rapidly with steam. Sodium: Reacts rapidly with cold water Zinc: Only reacts when powdered and strongly heated in steam |
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What does a metal form when it reacts with dilute hydrochloric acid?
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Metal Salt + Hydrogen |
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What happens to Sodium, Calcium, Magnesium and Zinc when they react with dilute hydrochloric acid?
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Sodium: Very violent- explosive
Calcium: Very rapid- lots of hydrogen bubbles formed. Magnesium: Rapid- hydrogen bubbles produced steadily Zinc: Slow- bubbles of hydrogen produced slowly |
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True or False? Only metals above hydrogen react with hydrochloric acid? |
True
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True or False?
Only metals above hydrogen will react with water or steam? |
True
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What makes it easier for electrons to be lost in ions? |
- The distance between them and the positive proton.
- The more shells between them and the positive proton. - The less positive protons there are. |
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what is a reductant? |
A more reactive metal that is taking place in a displacement reaction. |
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True or False? Carbon can not be used as a reducing agent? |
False
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How do you remove oxygen from metals when you don't have a more reactive metal?
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You extract the metals by electrolysis.
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What is thermal decomposition?
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The breakdown of a compound into two or more substances by heat
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When lithium hydroxide is heated, what does it form? |
Lithium Oxide (s) + H2O (g)
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True or False?
All alkali metal hydroxides do not decompose? |
False
(Lithium hydroxide is an exception) |
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What do the alkali metals nitrates decompose to form? |
Metal Nitrite (NO2) + Oxygen |
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What do nitrates of other metals decompose to form? |
A metal hydroxide, Nitrogen dioxide and oxygen |
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What do nitrates of very unreactive metals such as silver decompose to form? |
Nitrogen dioxide, oxygen and the metal itself
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What influences the stability to thermal decomposition of metals? |
The reactivity of the metals. The more reactive a metal, the more stable to thermal decomposition it is. |
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When a metal hydroxide is heated, what does it decompose to form?
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Metal oxide + water |
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What do metals carbonates form when decomposed? |
metal oxide + Carbon Dioxide |
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