Date post: | 27-Dec-2015 |
Category: |
Documents |
Upload: | prosper-george |
View: | 214 times |
Download: | 0 times |
HELLO MINIONS!!!We have work to do.
WHAT ARE WE UP TO TODAY?
• Go over History of the PToE.
• PToE basics.
PERIODIC TABLE OF ELEMENTS
• Why is organization important?• As students why must you be organized?
• What is a pattern?• Where do you see patterns?
PTOE HISTORY
• 1869 • 63 elements were discovered• Few gasses, few liquids, most solids
• Dmitri Mendeleev (men duh LAY ef)• There are patterns here!• Some had similar physical and chemical properties• Wrote down some info on individual cards
• Melting Point• Density• Color• Atomic mass & number of chemical bonds it can form
PTOE HISTORY
• AHA!!!• He noticed a pattern of properties appeared when he
placed them in order of increasing atomic mass!• He also found that the properties repeated!
• After Fluorine was Sodium (neon wasn’t discovered yet)• Sodium reacted with water like Lithium (Li) and
Potassium (K).
HERE WAS HIS PTOE!!!
MODERN PTOE
A LOT OF STUFF!!!
• Solid, liquid, gas, not found in nature!
• Metal, metalloid, nonmetal
• Stable, kinda stable, unstable
• Listed in Periods and Groups
• A LOT TO TAKE IN!!!• “Don’t Panic”
HERE IS HOW IT IS ORGANIZED!
• Period: Horizontal Row ↔• Contains a series of different elements, just like a days
of the week on a calendar!• Left side: HIGHLY REACTIVE!!!• Middle: Less reactive metals• Right Side: Metalloids then nonmetals.
HERE IS HOW IT IS ORGANIZED!
• Group: Vertical Row. ↕• Also known as “families”• These elements are similar to each other, like on a
monthly calendar all the days that are “Monday” or “Saturday”.
• Group 1 reacts violently with water• Group 17 reacts violently with group 1• Group 18 tend to be stable
MODERN PTOE
LOOK A LITTLE CLOSER…
SOME STUFF TO GET STRAIGHT…
• Elements all have multiple isotopes with individual atomic weights so the mass is determined by the weighted mean of all of the isotopes.
HOW ELEMENTS FORM…
NUCLEAR FUSION!!!
•
NEXT UP…
Questions & Homework