Download Periodic Table

Periodic Table - Groupings
Challenge ? (your choice)
• What causes elements in a
group (family) to behave in a
similar way?
• This non-reactive gas is in
the same period as sodium?
Connection
• How is the periodic table like a calendar?
– The periodic table has _____________________
like a calendar has ________________________
– The periodic table has …
– The …
Vocabulary
Do not define from the glossary, read the section of the text relating to these words,
the index will tell you the page #.
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Periodic
Period
Group/family
Alkali metals
Alkaline-earth metals
Halogens
Noble gases
Resources
• Periodic Table Groupings PowerPoint
• Placing All Your Elements on the Table
• Alkali Metal Reactions - Video Video
Objective
Notes
Explain why
elements in
the same
group have
similar
properties.
Describe the
properties of
the groups.
• Alkali metals –
• Alkaline-earth metals• Halogens• Nobel gases-
Objective
Notes
Explain why
elements in
the same
group have
similar
properties.
• All atoms what to have a balanced charge but they also want to have a full
valance shell. Atoms will often take, loose or share electrons on order to
fill the valance. All atoms that have the same # of electrons behave in a
similar fashion. The atoms with fewer electrons on the valance and/or the
fewer electrons needed to fill the valance are very reactive and combine
easily to form compounds. Atoms with full valances do not react to form
compounds.
Describe the
properties of
the groups.
• Alkali metals – all metals, one valance electron, very reactive, soft, silver in
color, shiny
• Alkaline-earth metals- all metals, 2 valance electrons, very reactive but less
than alkali metals, silver colored
• Halogens-all non-metals, 7 valance electrons, very reactive, poor
conductors, reacts violently with alkali metals, never found in nature
uncombined
• Nobel gases- all non-metals, full valance level, unreactive, colorless,
odorless gases at room temp.