Podcast
Questions and Answers
Which of the following properties is characteristic of metals?
Which of the following properties is characteristic of metals?
Which statement about non-metals is true?
Which statement about non-metals is true?
What happens to metallic properties as we move from top to bottom within a group of the periodic table?
What happens to metallic properties as we move from top to bottom within a group of the periodic table?
Which of the following is the most active metal among the first 20 elements?
Which of the following is the most active metal among the first 20 elements?
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Which property implies that a substance is likely a non-metal?
Which property implies that a substance is likely a non-metal?
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What distinguishes mercury from most other metals?
What distinguishes mercury from most other metals?
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In terms of electrical conductivity, how do non-metals typically behave?
In terms of electrical conductivity, how do non-metals typically behave?
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What is the least active non-metal among the first 20 elements?
What is the least active non-metal among the first 20 elements?
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Study Notes
Comparison of Metals and Non-Metals
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Metals:
- Typically solid at room temperature
- Shiny surface when cut or scratched
- Do not break easily when dropped
- Good conductors of heat and electricity
- Malleable (can be shaped)
- Produce a sound when struck
- Metallic properties increase going down a group and decrease across a period
- Potassium is the most reactive metal among the first 20 elements.
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Non-Metals:
- Often gaseous at room temperature
- Soft and crumbly
- Poor heat and electricity conductors
- Properties decrease going down a group and increase across a period
- Fluorine is the least reactive non-metal (and also the most reactive of all) among the first 20 elements.
Identifying Metals and Non-Metals
- To determine if a material is a metal or non-metal, observe multiple properties.
- Consider if the object shines, is soft or crumbly, conducts electricity, and if it produces a sound when struck.
Testing Electrical Conductivity
- Electrical conductivity can be tested using a circuit with a bulb.
- Connect the object to be tested in the circuit; if the bulb lights up, the object conducts electricity.
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Description
Explore the characteristics that differentiate metals from non-metals. This quiz covers physical properties, reactivity trends, and identification methods of these two fundamental categories of elements. Test your knowledge on the first 20 elements and their classifications.
