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Periodic Law
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elm w/ similar properties lined up
Groups
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metals : Conduct heat/electricity ,
Malleable, ductile ,
Often shiny ,
tend to lose ecations ,
transition metals
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generally the left side
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Group IA : alk metals
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reactive, lose le , form +1 cations
,
I vale-
,
form all (basic) solutions in H2O
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ey : na = nat + e-
,
na + Hz0 + 120H +
Hz ,
a ,
Ive Tve Sve
Zve 3 ve Suc bre
↳ very exothermic, reactive
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Group 2A : alk earth metals
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reactive, lose ze-
My+ My + H20
-
-
ey: My >
-
+ ze
,
+
My20H)z + Hz
- metalloids
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mixed properties semiconductors
,
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101-Metals
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variable properties , poor conductors ,
gaine to b roble gas
-
generally on night side
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covalently band
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Group >A : Habyens
- reactive non metals , guin let ,
have 7 vale so want octet
Cl > Cl-
- -
-
eg : + e
,
Fz , Cle , Bre ,
12
↳ exist as diatomic molecules be it makes actet
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Group 8t : Noble gasses
bonds
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non reactive , don't like forming chemical be alr have octet
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He , Me ,
Ar, Kr , Xe , R
Bonding
- Ionic = electr static attraction between opp charges
-
cation (+ ) /anion (-)
↳ metals/nonmetals
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eg Kir
-
evalent =
sharing of e-
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eyHCl-H ..: * Most elm form octet but It wants a duet (2et
H - :
* things on left bond w right , things on right bond wright
↳ is nic ↳ covalent