Periodic trends 6.1 & 6.2
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PERIODIC TRENDS 6.1 & 6.2
description
Periodic trends 6.1 & 6.2. History. Newlands - 1864 organized by atomic mass Law of Octaves Mendeleev - 1869 Organized by atomic mass with similar properties down columns Predicted properties of UN-discovered elements. History. Mosely – 1913 - PowerPoint PPT Presentation
Transcript of Periodic trends 6.1 & 6.2
PERIODIC TRENDS 6.1 & 6.2
History
Newlands - 1864 organized by atomic mass Law of Octaves
Mendeleev - 1869 Organized by atomic mass with similar
properties down columns Predicted properties of UN-discovered
elements
History
Mosely – 1913Many elements in Mendeleev’s table shown
to be out of placeRearranged by number of protons rather
than atomic mass
Periodic Law
The repetition of chemical and physical properties as a result of organizing elements by increasing atomic number
Modern Periodic Table
Metals, Non-Metals, Metalloids
Alkali Metals
Alkali Earth Metals (Rare Earth)
Transition Metals
Inner Transition Metals
Halogens
Noble Gases
Valence Electrons
Arsenic
Arsenic [Ar] 4s2 3d10 4p3
Arsenic [Ar] 4s2 3d10 4p3
Arsenic [Ar] 4s2 3d10 4p3
Group number Valence electrons
5A 5
15 5
Arsenic [Ar] 4s2 3d10 4p3
Group number Valence electrons
5A 5
15 5
(15-10)
D Block
S Block
P Block
F block
