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Periodik’s System Element
By : Moh. Suwandi, S.Pt, M.Pd
SMA MAARIF NU PANDAAN
TERAKREDITASI
2008
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Periodik’s System Element
1
Interest default – Base Interest and Indicator
2
Periodik's System developing Element
3
Faction and Period determination
4
Periodik’s character element
5
Exercise
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INTEREST DEFAULT – BASE INTERES
and Indicator
INTEREST DEFAULT :
Description atomic structure, periodik's characters element, chemical bond,
molecular structures and its character
BASE INTEREST
Description atomic, atomic structure, elemental characters, relative atomic
mass, and periodik's characters of periodik's tables
INDICATOR
1. Determining faction & perioda elements in periodik's system table
2. Identify characters Periodik is Element
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Periodik's System developing Element
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Periodik's System developing Element
1. Antonie Lavoiser
On year 1789, agglomerate 33 element have already found by that times
base chemical property, as 4( four) group, which is gas, earth,
metal, and non metal. Group this stills over common, since
apparently deep agglomerate elemental metal still available metal sort that
having different character. Although such Lavoiser was successful makes
one of Periodik's System form.
2. Triade Dobereiner
On year 1829, agglomerating elements bases resemblance
its character. Where 1 elemental group comprise of 3 elements, apparently
character element that intermediating to constitute average of first element
character and third. Finally been known by Periodik Dobereiner's System.
Triade's law sounds:“If three elements in triade is arranged according to
its atomic mass ascension, mass elemental atom in the middle (to - 2) equal
to atomic mass average elemental 1st
and 3rd ”.
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3. Oktaf New Lands ( 1863 )
New Lands agglomerating element bases chemical property resemblance
and atomic mass ascension. Element the first have character as elemental
as to - 8 and so on. Octave law from New Lands sounds:
“If elements is arranged bases its atomic mass ascension, its character
on the turn regularly or periodik”.
4. Mendeleyev-Lothar Meyer (1869)
Elemental collation up on atomic mass ascension apparently been followed
periodik's ala denaturing. Lothar Meyer goes upon on character
chemical. Apparently result kindred find. Periodik's law Modern interposed by
Mosseley. Element is arranged terminological ascension atomic
number,followed by periodic's ala denaturing. Elemental character
concerning with electron configuration, electron's configuration bases number
its atom. Periodik's law Modern was called By System Periodik forms length.
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5. Periodik Modern
On year 1913 Moseley's Henries( English nation), doing experiment
elemental wavelength measurement utilize x-ray bases Moseley's
experiment result concludes that atoms base character be not
constituted by relative atomic mass, but bases amount ascension
proton in atom. Apparently Periodik's System this Modern gets to
settle weakness of Periodik's system in advance.
This periodik's system comprise of vertical or faction column and the
line horizontal or period
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Faction and Period determination
Periodik's system Forms Length, consisting of :
Main Faction ( A ) consisting of : Faction IA until VIIIA
a. Faction
Transition Faction ( B ) consisting of : Faction IB until VIIIB
b. Period : Horizontal column that consisting of 7 periods
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Electron configuration and valence Electron
a. Electron configuration
Bohr's atomic theory declares for that electron – electron
circulates to drawn round fundamental atoms on orbit – given
orbit or skinned given. Skin can function to determine period
position an element
Kulit “K”
INTI
Kulit “L”
Kulit “M”
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Total maximum electron in every skinned atom
according to “Wolfgang Pauli”
2n2
n = kulit
Skin
Skinned number
Total maximum electron
K
1
2 ( 1 )2 = 2
L
2
2 ( 2 )2 = 8
M
3
2 ( 3 )2 = 18
N
4
2 ( 4 )2 = 32
O
5
2 ( 5 )2 = 50
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Electron inlay in skinned atom “Aufbau's order ”
( aufbau in german language
matter “ builds ”)
“Attention’
1s
s = sharp ( 2 )
p = prinsipal ( 6 )
d = difuse ( 10 )
f = fundamental ( 14 )
2s
2p
3s
3p
3d
4s
4p
4d
4f
5s
5p
5d
5f
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In Faction and Period Determination utilizes to step electron configuration
Example :
a. Determine elemental position 7N in periodik's system element .
For working out it utilizes electron configuration :
2
2
3
7N : 1s . 2s . 2p
K
L
2
5
So
: ev = 5
Faction
= VA
Period
=2
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Character Periodik's Element
1. Atom finger = distance of atom until skin core most extern
Worked up
Worked up
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2. Ionizing potential: needful minimum energy by a neutral atom or ion
to take down one bonded electron most in and out fasa gases most
ionization
Worked up
Worked up
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3. Electron afinitas: detached or permeated energy while one electron
added to atom or ion in fasa gases most ionization
Worked up
Worked up
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4. Elektronegatif : ability measure an atom to pull electron in its cords
while atom's forms bond
Worked up
Worked up
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Exercise
1. Element X by atomic number 20 and elemental Y
with atomic number 31 and elemental Z with
atomic number 38. Point out that element third that
available in one faction or period
2. Element A with atomic number 52 and elemental B
by atomic numbers 49 and elemental C by atomic
numbers 84. Point out that element third that
available in one faction or period
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3. Known by electron configuration many elements
following:
Element A = 2 8 4
Element B = 2 8 18 7
Element C = 2 8 1
Determine that elemental position deep
periodik's system
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