1. Topic 5
The Periodic Table

2. Topic 5 – The Periodic Table
The genius of Mendeleev's periodic table - Lou Serico
The genius video found by Matt and Owen

3. Groups and Periods Vertical columns are called groups
Horizontal rows are called periods

4. Each element http://periodictable
The charge an atom
becomes after it has
given or taken e-s
Number of protons
Either the first letter of the name,
first two letters of the name,
two letters from the name,
or letters from the Latin name.
Given by the person
who discovered it.
Interactive periodic table poster
Mass of the protons + mass of the neutrons
Each proton and neutron has an
approximate mass of 1 amu or g/mol
Round each atomic mass to the nearest whole number
# neutrons = atomic mass – atomic number
Amu = atomic mass unit
g/mol = the mass of 1 mol of atoms
1 mol = 6.02 x 1023 atoms

5. Atomic Mass and Number
Atomic mass is the AVERAGE mass of an atom of an element.
Every atom has a different mass that is UNIQUE to the element in which it belongs
Atomic number is the number of protons an element has in its nucleus.

6. Examples FLUORINE 9 F 18.998 Element Atomic Number Symbol Atomic Mass
Fluorine will have NINE protons in the nucleus and NINE electrons how many neutrons will it have????

7. Atomic Mass continued The mass of an atom is ENTIRELY in the nucleus
So for Fluorine, the atomic mass is
We use math rules and either round up or round down.
So Fluorine would have an atomic mass of 19.

8. Example Fluorine will have 9 protons and 9 electrons
FLUORINE 9 F
Element Atomic Number
Symbol
Atomic Mass
Fluorine will have 9 protons and 9 electrons
Fluorine will have 19 (rounded up) – 9 = neutrons.
So, 10 neutrons

9. Example: Oxygen What is the atomic number of Oxygen?
What is its atomic mass?
What is the standard Atomic Notation of Oxygen?
How many protons does it have? Electrons?
How many neutrons does it have?