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List characteristics of metals
- Malleable, ductile, shiny, high melting point/boiling point, solid at room temperature (except murcury), conductor of heat and energy
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List characteristics of non-metals
- Not malleable, bot ductile, not shiny, low melting/boiling point, liquid or gass at room temperature, bad conductor of heat and energy
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What is a good semi-conductor?
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Metals ......... Electrons resulting in a ....... Ion
- Metals lose electrons, resulting in a positive ion
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Metals exist as a .... of ..... charged .... in a sea of ...... electrons
- Metals exist as a lattive of positively charged ions in a sea of delocalised electrons
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What are Alloys?
- Substances that come from metallic elements, and are tailor made to have properties to suit a particular purpose
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2 Examples of Alloys:
- 1) The sink that wont rust is stainless steel
- 2) Lead conducts electricity well, but its melting point is very high. Alloying with tin allows cood conductivity, and a low melting point. Hence its great for soulder.
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How do you find the mass of a neutron?
- Mass of proton+Mass of electron
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How do you find the mass number of an element?
Number of protons + Number of neutrons
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What is an isotope?
- Atoms of the same element (same atomic & proton number) but with a different number of neutrons.
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What will a charged non-metal end in?
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Non-metal ions will always be...
- Negative charge, and ending with IDE
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