17518705 Periodic Table of Elements
of 11
Transcript of 17518705 Periodic Table of Elements
-
8/8/2019 17518705 Periodic Table of Elements
1/11
Dirk Benedict R. Miranda
BSN Misamis University
-
8/8/2019 17518705 Periodic Table of Elements
2/11
Development of the
Periodic table
-
8/8/2019 17518705 Periodic Table of Elements
3/11
Arrangements of
elements with their
physical and chemical
properties
Dirk Benedict R. Miranda
BSN Misamis University
-
8/8/2019 17518705 Periodic Table of Elements
4/11
1817 Johann Dobereiner, German chemist formed a triad of three elements;
Calcium, Barium and Strontium with their similar properties.
1863 John Newlands, an English chemist proposed a classification in which
the elements are arranged in order of their increasing atomic masses. He
observed the repetition of similar properties for every eight element. He proposedthe Law of Octaves.
1869 Lothar Mayer, a German chemist devised a classification of the elements
into a table that accounted for the periodic variations in properties. His table
included 56 elements.
1869 Dmitri Mendileev, a Russian chemist who arranged the elements in the
order of their increasing atomic weight, by arranging the elements so that those
with similar characteristics are in vertical groupings. He made the Periodic Table
Of elements
-
8/8/2019 17518705 Periodic Table of Elements
5/11
-
8/8/2019 17518705 Periodic Table of Elements
6/11
Horizontal rows are called PERIODS or SERIES
Vertical columns ofelements are called GROUPS
Group I A Alkali metalsII A Alkaline earth metals
III A Boron family
IV A Carbon family
V A Nitrogen familyVI A Oxygen family
VII A Halogen familyVIII A or group zero Noblegans
-
8/8/2019 17518705 Periodic Table of Elements
7/11
-
8/8/2019 17518705 Periodic Table of Elements
8/11
1. They are hard, dense, solid (except mercury which is a liquid)
2. Shiny and can be polished
3. Malleable (can be hammered and rolled into sheets) and ductile (can
be drawn into wires).4. They alsofor alloys, which are solutions ofone or more metals
dissolved In another metal.
5. Conducts heat and electricity
6. Usually have high melting points
7. Have high tensile strength
8. Sonorous (ringing sound when struck)
-
8/8/2019 17518705 Periodic Table of Elements
9/11
1. There are 18 non-metals that appear to the right side of the periodic
table.
2. Some are gasses, liquid and solids
3. Less dense and softer (except diamond)
4. Dull (except diamond) and cannot be polished
5. Brittle
6. Not sonorous
7. Do not conduct electricity
8. Low melting point
9. Low tensile strength
-
8/8/2019 17518705 Periodic Table of Elements
10/11
1. Six element Boron, silicon, germanium, arsenic, antimony and
tellurium.
2. Some of their properties are metallic and some are non-metallic
-
8/8/2019 17518705 Periodic Table of Elements
11/11
1. A help in the understanding of the
physical and chemical properties of
many elements
2. It is a guide to chemical prediction andtheory
3. Several periodic variations and
correlations can be predicted by using
the periodic table
4. It is also
used to
determine th
efo
rmulafor compound.
