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Elements and the Periodic Table
Fichas del conjunto (17)
- 1ElementsSubstances that cannot be borken down into simpler materials.
- 2Atomic NumberNumber of protons
- 3GroupVertical
- 4PeriodHorizontal
- 5Right of stepped lineNon-metals
- 6Left of stepped lineMetals
- 7Group 1Alkalis
- 8Group 2Alkaline Earth Metals
- 9Group 7Halogens
- 10Group 8Noble Gases
- 11Alkali Metals physical/chemical propertiessoft, silver metals, low density
reactivity increases doen the group, react with water forming hydroxide and hydrogen and with air to form oxide - 12What are alkali metals stored in and why?Oil - to prevent reaction with atmospheric oxygen or with water
- 13Alkaline earth metals physical/chemical propertiessilver metals, harder then alkali metals
less reactive than corresponding alkali metals, reactivity increase down the group - 14Halogens physical/chemical propertiesNon-metals, low melting and boiling points
very reactive, reactivity decreases down the group, react with hydrogen giving compounds which dissolve in water to form acidic solutions, react vigorously with sodium and other alkali metals giving white salts - 15Noble Gasesgases at room temperature, boiling point and density increases going down the group
least reactive, inert gases - 16Dmitri MendeleevHe organised his table according to his 'periodic law' : Elements are arranged in order of atomic weight in such a way that elements with similar chemical properties are in the same group.
- 17Mass numberTotal number of protons and neutrons
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- GCSE Science Fichas sobre Elements and the Periodic Table, creado por Peter Hoskins el 31/05/2015.
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- Peter Hoskins
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- Creado por eimearkelly3 · 31 may 2015
- Copiado por Peter Hoskins · 31 may 2015
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