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The Periodic Table (group names (group 1 the alkali metals (have one…
The Periodic Table
What
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arranged them in order of the mass of the atoms of each element and lined up elements that behaved similarly.
modern periodic table
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vertical columns are called groups, where the elements with similar physical and chemical properties are grouped together
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group names
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group 7 the Halogens
the elements have 7 electrons in their atoms outer shell they are trying to gain a electron . elements include fluorine and chlorine
group 8 the noble gases
the elements in group 8 are all gases and have full outer shells of electron in their atoms. as a result , the noble gases are unreactive and thus very stable. members of the noble gases include Helium, neon and argon
Alkali metals
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reactions with air
all metals are shiny. alkali metals look dull, but when they are cut a shiny surface is revealed. this shiny surface goes dull again as the metal reacts with oxygen in the air forming the metal oxide.
for lithium reaction with oxygen= lithium + oxygen = lithium oxide
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