Periodic table notes

Periodic Table: Chart that shows various FAMILIES of elements Arranged into ROWS and COLUMNS Rows: across Columns: down

3. THREE categories (pieces of information) found on the Periodic Table: Symbol – represents a specific element - Ex. H is what element? -HYDROGEN

b. Atomic Number – table is organized and arranged from left to right by increasing atomic number. **Element’s ID ,[object Object],[object Object]

c. Mass Number – Most of the mass of an atom is in the nucleus ,[object Object]

Can be found by ADDING the PROTONS and NEUTRONS

Mass # = protons + Neutrons Ex. H 1 proton + 0 Neutrons = _______ Ex. Li 3 protons + 4 Neutrons = _______ Ex. Al 13 protons + 14 Neutrons = _______

Mass # = protons + Neutrons How can you find the number of neutrons in Phosphorus? Mass # = ______ #Protons= ______ __________________ # Neutrons=

Mass # = protons + Neutrons How can you find the number of neutrons in Phosphorus? Mass # = 31 #Protons= 15 __________________ # Neutrons= 16

4. Bohr Models a. Model of the atom that shows protons, neutrons, electrons, and energy levels

4. Lewis Dot Structures a. Model of the atom that shows the VALENCE electrons of the atom

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