1. And NO, you can’t eat off of it! Unless you’re real desperate…
The Periodic Table…
And NO, you can’t eat off of it!
Unless you’re real desperate…

2. Major Concepts Atomic Structure Masses of Atoms The Periodic Table
What are atoms made of?
What are electron levels?
Masses of Atoms
What is atomic mass?
How is atomic mass calculated?
What are isotopes?
The Periodic Table
Why is it arranged so?
How do I read the periodic table?

3. Substances Atoms are the most basic unit of matter
118 elements known today

4. Substances Element Matter that is made of ALL the same atoms
Elements can be any size/shape/volume so long as it is all the same matter
What are some elements we know of? How many elements are there?

5. Substances Compounds Combination of two or more atoms/elements
Most common substance
What are some common compounds you use everyday?
Why are there more compounds than elements?

6. Atomic Structure
Each atom on the periodic table has a specific chemical symbol
Chemical symbols – are abbreviations of elements
Consist of a capital letter and sometimes followed by a lower case letter

7. C Ne Au Atomic Structure 6 Carbon 12.0107 10 Neon 20.1797 79 Gold
Some chemical symbols are from Latin
Why might some symbols be in Latin? 6 C
Carbon 10 Ne
Neon 79 Au
Gold

8. Atomic Structure Nucleus – the center of an atom
Protons – positively (+) charged particle in the nucleus
Neutron – Neutral (no) charged particle in the nucleus

9. Atomic Structure Electron – Negative (-) charged particle of an atom
- Exist outside of the nucleus
Nucleus
Protons
Neutrons
Nucleus
Electrons
Nucleus
Protons
Neutrons

10. Atomic Structure

11. Atomic Structure
Electron cloud – region round nucleus in which electrons exist
Electron levels – paths around nucleus that electrons travel
- Grown in energy the further away from nucleus
- Outermost level can only support 8 electrons

12. Atomic Structure

13. Atomic Structure Quarks – particles that make up protons and neutrons
- Were discovered by colliding atoms together
- 3 quarks make up proton
- 3 quarks make up neutron

14. Atomic Structure
Quarks

15. Masses of Atoms Mass Unit – the mass of one proton or neutron particle
Mass Number – the sum of protons and neutrons in an atom
Does the periodic table tell us Neutrons?
Protons +
Neutrons
Mass Number
Protons
Protons +
Neutrons

16. Masses of Atoms Mass Number - Protons (Atomic Number) Neutrons
We can use the mass number to find the number of neutrons
Why is the atomic mass in decimals then?
Mass Number -
Protons (Atomic Number)
Neutrons
Mass Number
Mass Number -
Protons (Atomic Number)

17. C Ne Au Masses of Atoms 6 Carbon 12.0107 10 Neon 20.1797 79 Gold
Average Atomic Mass 6 C
Carbon 10 Ne
Neon 79 Au
Gold

18. Masses of Atoms Isotope
Atoms of the same element that have a different number of Neutrons
Because atoms have different numbers of neutrons, we average the numbers together

19. Masses of Atoms
Isotopes
Hydrogen
Hydrogen1
Hydrogen2

20. Periodic Table Atomic Number
Indicates the number of protons in an element
Increase in order of size/weight

21. C Ne Au Periodic Table 6 Carbon 12.0107 10 Neon 20.1797 79 Gold
Atomic Number 6 C
Carbon 10 Ne
Neon 79 Au
Gold

22. Periodic Table Groups Vertical columns in the periodic table
Numbered 1-18
All elements in a group share properties

23. Periodic Table Dot Diagram
Diagram that shows how many electrons are in the outermost energy level
Electrons are represented by dots
Has Chemical Symbol & dots

24. Periodic Table
Dot Diagram

25. Periodic Table Periods Horizontal rows in the periodic table
Numbered 1-7
Also called levels

26. Periodic Table Dimitri Mendeleev (1834-1907) Russian Chemist
Created 1st periodic table
Arranged his table based
on atomic masses

27. Periodic Table Metals Elements on the left-hand side
Have common properties
Exist as solids
Good conductors of heat/energy

28. Periodic Table Non-Metals Elements on the right-hand side
Have common properties
Exist as brittle solids and gases
Not conductors of heat/energy

29. Periodic Table Metalloids Elements next to the stairstep
Share properties of metals & nonmetals

30. Major Concepts Atomic Structure Masses of Atoms The Periodic Table
What are atoms made of?
What are electron levels?
Masses of Atoms
What is atomic mass?
How is atomic mass calculated?
What are isotopes?
The Periodic Table
Why is it arranged so?
How do I read the periodic table?

31. Periodic Table
CHECKPOINT 7

32. Checkpoint 7 1. The nucleus of an atom is comprised of _____.
Protons & Neutrons
b) Protons & Electrons
c) Neutrons & electrons
d) protons & isotopes

33. Checkpoint 7 2. Which of the following is NOT a chemical symbol? C
b) Ca
c) Cl
d) CA

34. Checkpoint 7 3. In group 1, _____ is the only element that is a gas.
Lithium
b) Hydrogen
c) Sodium
d) Potassium

35. Checkpoint 1
Match the charges to each of the particles 4. Electron a) positive 5. Neutron b) negative 6. Proton c) none

36. Checkpoint 1
7. Explain why some chemical symbols are Latin words

37. 8. Identify this element

38. Checkpoint 1
9. Compare/Contrast an element and a compound