Elements & the Periodic Table Non-Metals & Metalloids Chapter 3 Section 3.
Periodic Table Of Elements. Understand the organization of the periodic table. Identify properties...
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Transcript of Periodic Table Of Elements. Understand the organization of the periodic table. Identify properties...
![Page 1: Periodic Table Of Elements. Understand the organization of the periodic table. Identify properties of metals and non-metals KEY WORDS Periodic tableFamilyPeriod.](https://reader036.fdocuments.net/reader036/viewer/2022062518/56649ea15503460f94ba4680/html5/thumbnails/1.jpg)
Periodic Table Of
Elements
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• Understand the organization of the periodic table. • Identify properties of metals and non-metals
KEY WORDSPeriodic table Family PeriodAlkali metals Group Chalcogens Noble gases Metalliods Earth MetalsHalogens Non-metals
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Periodic Table contains metals and non-metals.
A staircase separates metals from non-metals.
M e t a l sNon- metals
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Rows of the periodic table are called periods.
Elements in periods do not have similar properties.
From left to right :Elements go from metals to non-metals to gases.
per
iod
s
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A column is called a group. Elements in a group have similar chemical properties.
A family is a group with a specific name.
• Alkali metals• Alkaline Earth metals• Chalogens• Halogens• Inert (noble) gases
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METALS:Found on left hand side of staircase.
Have less than 3 valence electrons.
Conduct heat and electricity, shiny, solid at room temperature, need high melting temperatures.
METALS
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Alkali metal family:
• Group 1A.• Each element has 1 valence electron. • Soft, highly reactive metals.• In nature – always combined with other
elements.
*
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Alkaline Earth metals:
• Group 2A (IIA).• Less reactive than Alkali family. • Have 2 valence electrons.
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Metalloids:Behave like metals and non-metals.Elements on the staircase.
Transition Metals:Metals found in the short columns.
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NON-METALS:Found on right of the staircase.
Have 5 or more valence electrons.
Low melting temperatures, usually gases or fragile solids at room temperature, poor conductors.
Non- metals
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Chalcogens:
• Group 6A (VI). • Non-metals• Less reactive than the halogen family. • 6 valence electrons.
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Halogens:
• Group 7A (VII).• Poisonous and highly reactive non-metals.• 7 valence electrons.• Usually found combined with another element.
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Noble (inert) gases:
• Group 8A (VIII).• Elements are very stable non-metals – Unreactive• 8 valence electrons.• No natural compounds exist with these elements.
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Hydrogen*:
• Considered a non-metal gas.• Contains only 1 electron.• Highly reactive. • All hydrogen on Earth is combined with other
materials or with itself.
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• Metals on the left – non-metals on the right.
• Group number indicates the number of valence electrons.
• Noble gases are unreactive with 8 valence electrons.
• Elements in a group have similar chemical properties.