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on 30 April 2013

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Transcript of PT

All Transition Metals :
are malleable and ductile
have high melting and boiling points
have high electrical conductivity By Kaumron Eidgahy, Kathy Daniels, Jordan Penn, and Ethan Chung The Periodic Table Background Info Transition Metals Halogens Rare Earth Metals Noble/Inert Gases Alkaline Earth Metal Family Elements:
Be (Beryllium)
Mg (Magnesium)
Ca (Calcium)
Sr (Strontium)
Ba (Barium)
Ra (Radium) Alkali Metal Family Elements:
Li (Lithium)
Na (Sodium)
K (Potassium)
Rb (Rubidium)
Cs (Cesium)
Fr (Francium) Elements:
F (Fluorine)
Cl (Chlorine)
Br (Bromine)
I (Iodine)
At (Astatine) in 1869, Dmitri Mendeleev, a Russian chemist founded the Periodic Table when he arranged the elements in order of atomic mass he noticed a repeating pattern of similar properties All Rare Earth Metals :
are good conductors of electricity
have luster, but rust easily
are silver, silvery-white, or gray metals Characteristics: They are all shiny, relatively soft, and they are the highest reactive group of elements on the table. makes it easier for chemists to locate and understand elements the Periodic Table arranges the elements by common characteristics and behaviors they are arranged in rows (periods) and columns (groups/families) Real World Situations: 1. Lithium is what's inside your cellphone battery.
2. Potassium is found in your common banana.
3. Sodium mixed with hydroxide is used for soap making. 3 uses of Rare Earth Metals :
television & computer screens
hybrid cars
cellphones the Noble Gases are:
-He (Helium)
-Ne (Neon)
-Ar (Argon)
-Kr (Krypton)
-Xe (Xenon)
-Rn (Radon) characteristics that all Noble Gases have:
-are non-metals and,believe it or not, gases
- have 8 valence electrons, so they usually don't bond, which is why they are called the Inert Gases, this makes them more stable
-have very low energy and are bad conductors of electricity Characteristics: They are all are silver in color, they all are found in nature and that they all have 2 valence electrons. Real World Situations: 1. Magnesium is the third commonly used structural metal.
2. Barium added to firecrackers turns fireworks green.
3. Calcium is found in common milk. real world uses:
-helium is used to fill up balloons
-xenon has many uses from development in x-rays to plasma display panels
-radon is used in radiotherapy and can help arthritis Group 18 Dmitri Mendeleev Uses of Transition Metals :
some cosmetics All Halogens :
have low boiling and melting points
are poor conductors of electricity
are non-metals Uses of Halogens :
disinfectants Helium Balloon Group 1 Group 2 Group 3-12 Group 17 Lanthanoids
and Actinoids The Periodic Table tells the atomic number (number of protons/electrons), the atomic mass (average sum of protons and neutrons), and the number of valence electrons in the atom. ----> Periodic Patterns:
moving top to bottom
-atomic radius increases
-ionization energy increases
-electronegativity decreases
moving left to right
-atomic radius decreases
-ionization energy increases
-electronegativity increase
Full transcript