Warm Up Need notebook, colored pencils, glue and textbook(if you have it) List everything you currently know about the periodic table of elements. Tell me what you would like to know about the periodic table.

The Periodic Table

The Periodic Table Dmitri Mendeleev (1834 - 1907)

Dmitri Mendeleev 1) Father of the period table. 2)First to systematically arrange elements 3)Elements were arranged by their atomic masses Elements were grouped together according to their similarities *Empty spaces were left where he predicted undiscovered elements should go

Mendeleev’s Published Periodic Table of Elements Why do you think there are question marks here?

Henry Moseley He concluded that the number of protons in an atom is its atomic number In 1914, his work led to a revision of the periodic table

How is the Modern Periodic Table Arranged? Elements are now arranged by their atomic numbers Elements are arranged in periods and groups

What are Periods in the Periodic Table A horizontal row is called a period

A vertical column is called a group What are Groups? A vertical column is called a group Elements in the same group have similar properties and reacts in similar ways!

How is the Periodic Table Read? Each square gives particular information about the atoms of an element Atomic number Atomic Mass 13 Symbol Atomic number is the number of protons in the nucleus Average atomic mass (amu)the number of all isotopes of an element Al 26.981

What are the division of the Periodic Table?

Metal: Elements that are usually solids at room temperature. Most elements are metals. Non-Metal: Elements in the upper right corner of the periodic table. Their chemical and physical properties are different from metals. Metalloid: Elements that lie on a diagonal line between the Metals and non-metals. Their chemical and physical properties are intermediate between the two.

What metal is not a solid What are Metals? Location Found on the left of the zigzag line/staircase on the periodic table (exception  Hydrogen) Chemical Properties Have few electrons in their outer energy level, thus lose electrons easily Physical Properties Ductile (easily drawn into a wire), good conductors of heat and electricity, malleable (easily shape), shiny, most are solid @ room temperature 79 Au 196.967 11 Na 22.990 Image taken from: http://chemistry.about.com/od/periodictableelements/ig/Element-Photo-Gallery.--98/Sodium.htm What metal is not a solid @ room temperature?

What are Reactive Metals? Metals that are more likely to undergo a chemical change or reaction Alkali metals (group 1) are the most reactive metals Alkaline Earth metals (group 2) second most reactive metal group

What are Transitional Metals? Groups in the middle Groups 3-12 Generally less reactive then other metals Good conductors of heat and electricity. Some are used for jewelry and currency

What are Non-Metals? Location Most found to the right of the zigzag line/staircase on the periodic table Chemical Properties Most have almost full outer energy levels, thus they tend to gain electrons; some have completely full outer level Physical Properties not ductile or malleable, not shiny, poor conductors of heat and electricity, most are solid, but some are gas at room temperature 17 Cl 35.453 Image taken from: http://nobel.scas.bcit.ca/resource/ptable/cl.htm 16 S 32.066 Image taken from: https://www.dmr.nd.gov/ndgs/rockandmineral/sulfur.asp

What are Halogens? Group 17 All are non-metals Very reactive are often bonded with elements from Group 1 form salt compound 7 electrons in the outer shell

What are Noble / Inert Gases? Group18 Non-metals - Exist as gases Not reactive with other elements 8 electrons in the outer shell = Full /stable Helium (He) has only 2 electrons in the outer shell = Full/ stable

What are Metalloids? Location Border the zigzag line/staircase on the periodic table silicon is the most common Found in semi conductors Examples: computers, cell phone Physical Properties have properties of both metals and non-metals 14 Si 28.086 Image taken from: http://library.thinkquest.org/C0113863/bios.shtml 5 B 10.811 Image taken from: http://library.thinkquest.org/C0113863/bios.shtml

Rare Earth Metals Some are Radioactive The rare earths are silver, silvery-white, or gray metals. Conduct electricity Group 1 Group 18 Group 2 Group 17

Four chemical families of the periodic table: the alkali metals (IA), the alkaline earth metals (IIA), halogens (VII), and the noble gases (VIIIA). Group 1 Group 18 Group 2 Group 17

Directions Read Color Coding the Periodic Table to fill out Families ties Identify the following on your table: Metals, Nonmetals and Metalloids. At the top of your table make a coding key to include the name of the them. Select a color to represent each group and put that color by the name. Metals Non -metals Metalloids Label group 1, 2, 17 18 and your lanthanide and actinides elements See page 20 -21 D in book Trace the zig-zag line in Black