atoms and the periodic table
Download
Skip this Video
Download Presentation
Atoms and the Periodic Table

Loading in 2 Seconds...

play fullscreen
1 / 33

Atoms and the Periodic Table - PowerPoint PPT Presentation


  • 103 Views
  • Uploaded on

Atoms and the Periodic Table. Chapter 17 Mrs. Gerlach 10-11. Objectives. 17-1 Define and describe protons, neutrons and electrons. (Mass, location, charge) 17-2 Draw a Bohr model showing the correct number and placement of electrons.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Atoms and the Periodic Table' - samson-trujillo


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
atoms and the periodic table

Atoms and the Periodic Table

Chapter 17

Mrs. Gerlach 10-11

objectives
Objectives
  • 17-1 Define and describe protons, neutrons and electrons. (Mass, location, charge)
  • 17-2 Draw a Bohr model showing the correct number and placement of electrons.
  • 17-3 Know where to find atomic number and average atomic mass for an element on a periodic table.
  • 17-4 Calculate the number of protons, neutrons and electrons for an element.
  • 17-5 Calculate the number of atoms of each element in a chemical compound.
  • 17-6 Differentiate between atoms and isotopes.
  • 17-7 Identify the subatomic particle that determines the identity of the element.
slide4
Read the story about Atoms Family
  • We will fill in the info when you are done.
  • Jump to notebook
periodic table key
Periodic Table Key

Atomic Number- Tells us the number of protons and electronsthe element has

Symbol

Element’s Name

Atomic mass- subtract atomic number from the atomic mass to get the number of neutrons the element has

practice
Practice
  • Number of Protons?
  • Number of Electrons?
  • Number of Protons?
  • Symbol?
  • Atomic Mass?
history of the atomic model
History of the Atomic Model
  • In 1913 Niels Bohrproposed a model of the atom where electrons moved in definite orbits around the nucleus.
atoms on the pt
Atoms on the PT
  • Atomic number
  • Atomic mass
drawing an atomic model
Drawing an Atomic Model

STEP 1

# of protons

  • Equal to atomic #

STEP 2

# of neutrons

  • Equal to:atomic mass (rounded) - atomic #
drawing an atomic model1
Drawing an Atomic Model

STEP 3

# of electrons

  • Equal to # of protons
    • 1st energy level holds 2 e-
    • 2nd energy level holds 8 e-
    • 3rd energy level holds 18 e-
    • 4th energy level holds 32 e-
isotopes

VARIATIONS

of an element!

Isotopes
  • DEF: Atoms of the same element have different number of neutrons but the same number of protons and electrons.
  • Have different masses
    • Difference due to number of neutrons
showing isotopes
Showing Isotopes
  • Element name – mass number
      • Hydrogen – 1
      • Hydrogen – 2
mass number
Mass Number
  • DEF: Sum of protons and neutrons in the nucleus of an isotope
  • Different mass number for each isotope.
  • Based on the Atomic Mass
    • Round to a whole number
objectives1
Objectives
  • 17-5 Calculate the number of atoms of each element in a chemical compound.
compounds have formulas
Compounds have formulas.

H2O

Subscript

  • Applies to the element its attached to
  • May use parenthesis
compounds have formulas1
Compounds have formulas.

7H2O

Coefficient

  • Applies to the FULL formula
slide25
CO2
  • How many Carbon atoms are present?
  • How many Oxygen atoms?
slide26
3SO4
  • How many Oxygen atoms?
  • How many Sulfur atoms?
practice1
Practice!
  • S(H20)2
    • S = __
    • H = __
    • O = __
practice2
Practice!
  • 12H2SO4
    • S = __
    • H = __
    • O = __
practice3
Practice!
  • 8Na2(OH4)6
    • Na = __
    • H = __
    • O = __
practice4
Practice!
  • 10C6H12O6(OH)12
    • C = __
    • H = __
    • O = __
slide31
3(Mg,Fe)7Si8
    • Mg = __
    • Fe = __
    • Si = __
slide32
Periodic Acid – 12H5IO6
    • I = __
    • H = __
    • O = __
ad