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Periodic Trends Project
Transcript
The Periodic Table was invented by a Russian chemist & inventor named Dmitri Mendeleev in 1864. Mendeleev is considered the "father" of the Periodic Table, there are many scientist who contributed to its current structure.
Periodic trends learning project
TRENDS ACROSS PERIODS
and DOWN GROUPS
PERIODS GROUPS
ATOMIC RADIUS
IONIZATION ENERGY
A
I
M
E
S
DECREASE INCREASE
INCREASE DECREASE
DECREASE INCREASE
INCREASE DECREASE
- INCREASE
METALLIC CHARACTER
ELECTRONEGATIVITY
SHIELDING EFFECT
FOUR BLOCKS OF THE PERIODIC TABLE
BASED ON ELECTRONS CONFIGURATION
S- SPHERE
P- DUMBBELL
D- TOO COMPLEX
low density, low melting points...
good conductors, most highly reactive of the metals
F- TOO COMPLEX
PEL:
Very reactive, harder than Group 1, good conductors
Alkali Metals
Alkali Earth Metals
Halogens
Noble Gases
1x2 = 2
4x2 = 8
9x2 = 16
16x2 = 32
=
=
=
=
1
2
3
4
S (1)
S + P (1+3=4)
S + P + D (1+3+5=9)
S + P + D + F (1+3+5+7)
Most highly reactive of the non-metals.
Not very reactive at all; stable as elements meaning that they contain 8 valence electrons: no need for bonding.
Periodic Trends Project
BLOCK 5
By: Toniqua pearce
?
Why do elements in the same group have similar properties?
Elements in the same groups compare because of the similarities in there properties. Elements that are usually together have the same number of electrons in the outermost shell, we call this "valence electrons".
History of the "Periodic Table"
1649 -
1829-
1862-
1864-
1869-
1913-
Hennig Brand discovered phosphorus. Before this time people new of elements, but this started the Periodic Table.
Johann Dobereiner discovered the halogen triad & the alkali metal triad.
Chancourtois created the first version of the Periodic Table. He created the organization of sorting them by their physical properties.
John Newlands published his version of the Periodic Table with his accommodations.
Dmitri Mendeleev published his periodic table. "Father of PT"
Henry Moseley discovered elements isotopes.
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