Periodic Table

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Periodic Table
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• elements are arranged according to their atomic number;
  – the same number of protons in the nucleus.
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• in horizontal row – it’s called “periods and contain elements” that the same number of electron shells around the nucleus.
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• electron circle the nucleus at different distances depending on how much energy they have.

BSL Version

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Elements Organised by Group 1 to 18
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• Group 1 – Hydrogen / alkali metals (Group A)
• Group 2 – alkali earth metals (Group B)
• Group 3 – transition metals (Group C)
• Group 4 – transition metals (Group C)
• Group 5 – transition metals (Group C)
• Group 6 – transition metals (Group C)
• Group 7 – transition metals (Group C)
• Group 8 – transition metals (Group C)
• Group 9 – transition metals (Group C)
• Group 10 – transition metals (Group C)
• Group 11 – transition metals (Group C)
• Group 12 – transition metals (Group C)
• Group 13 – boron (Group D – Icosagen)
• Group 14 – carbon (Group E – Crystallogens)
• Group 15 – nitrogen (Group F – Pnictogen)
• Group 16 – oxygen (Group G – Chalcogen)
• Group 17 – halogens (Group H)
• Group 18 – noble gases (Group I)
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BSL Version

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Understanding about the Periodic table
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• elements are arranged according to their atomic number, which is the same as the number of protons in the nucleus.
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• the horizonal rows are called periods ~ contain elements that have the same number of electron shells around the nucleus.
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• there are nine vertical columns that called groups ~ these contain elements that have similar chemical properties; such as group I on the far right that contains the inert noble gases.
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• Group 1
  – contains the alkali metals; surprisingly ~ hydrogen is chemically an alkali metal.
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• Group 2
  – contains the alkali earth metals.
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• Group 2 to Group 16 – contains poor metals and non-metals; with the halogens in group 17.
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• Group 2 to Group 12 – metallic transition elements (which have incomplete inner electron shells) – located in the middle between group 2 and group 13.

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BSL Version