practice quiz
Download
Skip this Video
Download Presentation
Practice Quiz

Loading in 2 Seconds...

play fullscreen
1 / 13

Practice Quiz - PowerPoint PPT Presentation


  • 100 Views
  • Uploaded on

Aluminum _____ Zinc _____ Bromine _____ Sodium _____ Flourine _____ Gold _____ Copper _____ Nickel _____. 9. Ca __________ 10. C __________ Mg __________ Hg __________ Zn __________ Cl __________ K __________ Sn __________. Practice Quiz. Atomic Number

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 ' Practice Quiz' - darius-mcdonald


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
practice quiz
Aluminum _____

Zinc _____

Bromine _____

Sodium _____

Flourine _____

Gold _____

Copper _____

Nickel _____

9. Ca __________

10. C __________

Mg __________

Hg __________

Zn __________

Cl __________

K __________

Sn __________

Practice Quiz
slide2
Atomic Number

Protons

Electrons (for now)

Atomic Mass

Protons + Neutrons

9

F

19.0

  • Neutrons = atomic mass – atomic number
  • Periods/Energy levels are rows that go across
  • Families/Groups columns that go up & down
  • Electrons in outer energy level – same as column
how atoms differ
How Atoms Differ
  • Periodic Table
    • Ordered by the number of protons
      • the only thing about an atom that doesn’t change!
      • If you change proton number you change the element
mass of individual atom
Mass of Individual Atom
  • Mass of proton or neutron = 1.67 x 10-24 g
  • Mass of electron = 9.08 x 10-28 g

or 1/1840 the mass of proton

  • Atomic Mass = weighted average of the isotopes of an element
how to calculate atomic mass
How to calculate Atomic Mass
  • The same as calculating your grade
let s practice
Let’s Practice
  • Calculate the atomic mass

107Ag 106.905 amu 52%

109Ag 108.905 amu 48%

let s practice1
Let’s Practice

2. Calculate the atomic mass

1H 12%

2H 48%

3H 40%

let s practice2
Let’s Practice

3. Boron has two naturally occurring isotopes, boron-10 (abundance 19.8%, mass 10.013 amu) boron-11 (abundance 80.2%, mass=11.009 amu)

Calculate the average atomic mass

let s practice3
Let’s Practice

4. Calculate the average atomic mass

12C 12.0014 amu 87.3%

14 C 13.9960 amu 12.7%

let s practice4
Let’s Practice
  • Calculate the average atomic mass

Iron-55 67.8%

Iron-58 32.2%

let s practice5
Let’s Practice

6. Calculate the atomic mass

Helium has two naturally occurring isotopes, helium-3 and helium-4. The average abundance of helium-3 is 27.2%, and the average abundance of helium-4 is 72.8%

ad