1. What is an Element?

2. ELEMENT
A pure substance that cannot be broken down into a simpler substance

3. ELEMENTS Flip over your element card Read what element you are
Find 3 other people with the same element card as you. What do you notice about your element?
Find 3 other people with different elements than you. What do you notice about your element?

4. Element Cards
Oxygen
Carbon
Sodium
Gold

5. ELEMENTS All elements are made of atoms.
Elements are made of identical atoms.
Atoms differ in size when comparing different elements, but are the same size in similar elements.
Example: All oxygen atoms in the element oxygen are the same size, but are different in size than sodium atoms.

6. Examples Hydrogen (H) Sodium (Na) Gold (Au) Arsenic (As)
Beryllium (Be)
Lithium (Li)
Fluorine (F)
Mercury (Hg)

7. Chemical Symbols Used to abbreviate elements.
From the Greek and Latin language.
Rules for naming elements:
A single letter is always capitalized
If there are 2 letters in the symbol, the first is capitalized while the 2nd letter is in lower case.
Example: Carbon = C
Aluminum = Al

8. Chemical Symbols Some elements are named after their Latin names.
Example:
Sodium = Na (latin name natirum)
Gold = Au (atrium)
Silver = Ag (argentum)
Lead = Pb (Plumbum – name for soft metals)

9. Chemical Symbols Some are named for other reasons:
Scandium = Sc (region of discovery Scandinavia)
Berkelium = (from the University of California at Berkeley where the element was created)
Einsteinium = Es (in honor of the contributions of the physicist Albert Einstein)

10. What do I need to know? Need to the first 18 elements
plus K, Ca, Fe, Ni, Cu, Zn, I, Ag, Sn, Au, W, Pb, U
Highlight these elements on your periodic table.