Podcast
Questions and Answers
Which of the following elements is a liquid at room temperature?
Which of the following elements is a liquid at room temperature?
- Mercury (correct)
- Sodium
- Carbon
- Bromine (correct)
What is the main difference between the last energy level of a metal atom and a nonmetal atom?
What is the main difference between the last energy level of a metal atom and a nonmetal atom?
- Metals have more electrons in their last energy level. (correct)
- Metals have more neutrons in their nucleus.
- Metals have fewer electrons in their last energy level.
- Metals have more protons in their nucleus.
What property makes metals good for making jewelry?
What property makes metals good for making jewelry?
- Malleability (correct)
- High melting point
- Good heat conductivity
- Metallic luster (correct)
Why is graphite used in dry cells?
Why is graphite used in dry cells?
According to the table, which element has the highest melting point?
According to the table, which element has the highest melting point?
What is the primary reason for creating alloys from pure metals?
What is the primary reason for creating alloys from pure metals?
Which metals make up the bronze alloy?
Which metals make up the bronze alloy?
What is one of the noted properties of bronze as an alloy?
What is one of the noted properties of bronze as an alloy?
What is NOT a reason for recycling metals such as copper, aluminum, and iron?
What is NOT a reason for recycling metals such as copper, aluminum, and iron?
Which statement about alloys is true?
Which statement about alloys is true?
What is the primary feature of a metallic bond?
What is the primary feature of a metallic bond?
How does the number of valence electrons affect the properties of metals?
How does the number of valence electrons affect the properties of metals?
What is observed about the melting points of sodium, magnesium, and aluminum?
What is observed about the melting points of sodium, magnesium, and aluminum?
What characteristic is NOT typically associated with metals due to metallic bonding?
What characteristic is NOT typically associated with metals due to metallic bonding?
What happens to the strength of the metallic bond as the number of valence electrons increases?
What happens to the strength of the metallic bond as the number of valence electrons increases?
What is the property of sulphur that causes it to crumble easily when hammered?
What is the property of sulphur that causes it to crumble easily when hammered?
Which substance would not cause the electric bulb to light up when connected at points X and Y?
Which substance would not cause the electric bulb to light up when connected at points X and Y?
Which characteristic makes copper easily shapeable?
Which characteristic makes copper easily shapeable?
What is unique about graphite compared to other nonmetals?
What is unique about graphite compared to other nonmetals?
Which of the following properties does not describe metals like zinc and silver?
Which of the following properties does not describe metals like zinc and silver?
Flashcards
Alloys
Alloys
A mixture of two or more metals that combine unique properties.
Bronze alloy
Bronze alloy
An alloy made of 95% copper and 5% tin, harder than pure copper.
Properties of Bronze
Properties of Bronze
Bronze is harder than copper and does not rust.
Metal Recycling
Metal Recycling
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Reasons for Recycling Metals
Reasons for Recycling Metals
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Metallic Bond
Metallic Bond
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Crystal Lattice
Crystal Lattice
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Valence Electrons
Valence Electrons
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Melting Point
Melting Point
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Strength of Metallic Bond
Strength of Metallic Bond
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Brittle Nonmetal
Brittle Nonmetal
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Malleable Metal
Malleable Metal
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Graphite as Conductor
Graphite as Conductor
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Properties of Metals
Properties of Metals
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Metallic Conductors
Metallic Conductors
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Dry Cell Components
Dry Cell Components
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Malleability
Malleability
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Properties of Nonmetals
Properties of Nonmetals
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Conductivity of Nonmetals
Conductivity of Nonmetals
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Melting Points of Elements
Melting Points of Elements
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Study Notes
Alloys
- Pure metals are soft, almost unfit for industrial uses
- One metal is added to another metal melt to create an alloy
- Their properties differ from the properties of the original elements
- Alloys are mixtures, not compounds
- Most alloys are not expressed in molecular formulas
Bronze Alloy
- A mixture composed of copper (95%) and tin (5%)
- It is harder than copper.
- Resistant to rusting
- Used in jewelry, medals, and statues
Metal Recycling
- The process of converting wastes into new usable substances
- Some metals like copper, aluminum, and iron are recycled for these reasons:
- Decreasing the abundance (percentage) in the earth's crust
- Difficulty of extracting metals from their ores
- The lower cost of recycling compared to extracting them from ores
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