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The Periodic Table!. What is a compound ?. Compound: Two or more different elements chemically combined. Why wouldn’t it be acceptable to write the symbol for copper as CU?.

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The Periodic Table!

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The Periodic Table!


What is a compound?

Compound: Two or more different elements chemically combined.

Why wouldn’t it be acceptable to write the symbol for copper as CU?

If you are writing an element symbol, always capitalize the first letter and lowercase the second because otherwise it looks like a compound!


How would you write the chemical formula for solid NaOH dissolved in water?

NaOH (aq)

How many elements are present in H2SO4? Name all of the elements. How many atoms of each type of element are in the compound?

3 elements. Hydrogen, Sulfur & Oxygen.

2 H, 1 S & 4 O


Explain the difference between liquid sugar, C6H12O6(l), and aqueous sugar, C6H12O6(aq)

Sugar solution (aq)

Molten sugar (l)

  • A substance is aqueous if it is dissolved in water.


When Ca(NO3)2 (aq) is combined with BaCl2 (aq), two things are made:

CaCl2 (aq) and ___________.

Ba(NO3)2


All about the Periodic Table!

  • There are around 118 elements!

  • 1-92 are naturally occurring, and the rest are man-made.

  • Einsteinium was discovered in the radioactive debris of a hydrogen bomb test in the Pacific Ocean!


Mendeleev—1869

I organized the first periodic table!

http://www.westcler.org/gh/farrellchris/SciSongs/Artist%20-%20Mendeleev.mp3


Metals & Non-Metals


  • Metals:

  • Located on the left side of the periodic table.

  • They conduct heat & electricity

  • They are shiny and malleable (bendable)


  • Non-metals:

  • Located on the right side of the periodic table.

  • They are poor conductors of heat & electricity

  • They include gases (like nitrogen) and brittle solids (like sulfur).


  • Metalloids:

  • Have properties of both metals and nonmetals.

  • They are located along the zig zag (stair step) line.


Parts of the Periodic Table

Groups:Vertical columns. All groups have similar chemical properties.


Some FAMOUS Groups

on the Periodic Table


Alkali Metals

  • Group 1A (Li, Na, K, Rb, Cs, Fr)

  • Shiny, soft solids, highly reactive with water

  • Are never found as free metals (they are always combined with other elements).

http://www.youtube.com/watch?v=m55kgyApYrY


Start Metal Mouth!


Column 1: What does “react with water” really mean?

  • Sodium Video:

  • http://www.theodoregray.com/PeriodicTable/Stories/011.2/Videos/SodiumLake01.MOV


Alkali Metals

  • Brainiac Video Clip

  • http://video.google.com/videoplay?docid=-2134266654801392897&q=chemistry+sodium

  • “Real” Alkali Metals Clip

  • http://video.google.com/videoplay?docid=958199266084345892&q=chemistry+sodium&total=35&start=0&num=10&so=0&type=search&plindex=7

  • http://video.google.com/videoplay?docid=-5703982039778081291


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


Alkaline Earth Metals

  • Group 2A (Be, Mg, Ca, Sr, Ba, Ra)

  • Shiny, harder & more dense than the alkali metals

  • Highly reactive with water, but less reactive than the alkali metals.


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


  • The elements in the middle of the table are referred to as the transition metals.


Transition Metals

  • Groups 3-12 on the periodic table.

  • Less reactive than metals in groups 1A & 2A


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


Halogens

  • Group 7A

  • Most reactive of the non-metals!


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


The Noble Gases

  • Group 8A

  • Very unreactive

  • They do not combine with other elements under normal conditions and this is why they are sometimes called the “inert gases”.


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


Reactivity!

  • Elements in the lower left (the heavy alkali metals) and the upper right (lighter halogens) are the most reactive.

  • The noble gases (group 8A) and the transition metals (groups 3-12) are unreactive.


Most reactive metal:

Lower Left Corner


Most reactive non-metal:

Upper Right Corner (exclude noble gases)


Fluorine is very reactive

Fluorine gas (F2)


Parts of the Periodic Table

Periods: The 7 rows going across the table!

The lanthanides (aka the rare earth elements) and the actinides (aka the transuranium elements) are organized in rows rather than columns. *Interesting fact: All of the actinide series elements are radioactive!


Remember…Our table left off a group of elements


Lanthanides and Actinides


Alkali metals

Noble Gas

Alkaline Earth Metals

Halogens

Transition Metals


States of Matter

  • Most elements are solids at room temperature.

  • Some elements are liquids: Ga, Br, Hg

  • The elements that are gases are all of the noble gases and the following: N, O, F, Cl & H


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