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# Periodic table notes

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### Transcript

• 1. The Periodic Table
• 2. Periodic Table:
Chart that shows various FAMILIES of elements
Arranged into ROWS and COLUMNS
Rows: across
Columns: down
• 3. 3. THREE categories (pieces of information) found on the Periodic Table:
Symbol – represents a specific element
- Ex. H is what element?
-HYDROGEN
• 4. b. Atomic Number – table is organized and arranged from left to right by increasing atomic number.
**Element’s ID
• Atomic Number = # of PROTONS = # of ELECTRONS
• Ex. H
Atomic Number
• 5. Ex. S
• 6. Ex. S
• 7. Ex. K
• 8. Ex. K
• 9. c. Mass Number – Most of the mass of an atom is in the nucleus
• Mass number is usually found under the element symbol
• 10. Can be found by
and NEUTRONS
• 11. Mass # = protons + Neutrons
Ex. H
1 proton + 0 Neutrons = _______
Ex. Li
3 protons + 4 Neutrons = _______
Ex. Al
13 protons + 14 Neutrons = _______
• 12. Mass # = protons + Neutrons
How can you find the number of neutrons in Phosphorus?
Mass # = ______
#Protons= ______
__________________
# Neutrons=
• 13. Mass # = protons + Neutrons
How can you find the number of neutrons in Phosphorus?
Mass # = 31
#Protons= 15
__________________
# Neutrons= 16
• 14. 4. Bohr Models
a. Model of the atom that shows protons, neutrons, electrons, and energy levels
• 15. 4. Lewis Dot Structures
a. Model of the atom that shows the VALENCE electrons of the atom