1. Elements & The Element Square
Chapter 11
Section 2

2. Elements
element - a substance composed of a single kind of atom that cannot be broken down into another substance by chemical means.

3. Each element square represents 1 atom of that element
Mass

4. Atomic Number number of protons found in the nucleus of an atom ALSO
number of electrons surrounding the nucleus of an atom

5. Symbol
an abbreviation of the element name

6. Atomic Mass the mass of the atom Remember…
1 Proton = 1 amu
1 Neutron = 1 amu
can sometimes be used to help identify the number of protons & neutrons in an atom
Mass

7. Using the Square