Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ch 4 Section 8-9

Mass Spectrometry and Isotopic Abundance

Mass Spectrometry Instruments that measure charge-to-mass ratio of charged particles. First devised byFrancis Aston Generates ions that evacuate path inside a magnet Ions separated based on mass. Scientists determine the masses and abundances of the isotopes of an eleme
Graph of MS Plot Relative abundance by mass
Atomic Weight the weighted average of the masses of its stable isotopes
extent of which the beam of ions is deflected depends on 4 factors magnitude of the accelerating voltage (eletric field strength) higher voltages result in beams of more rapidly moving particles that are deflected less than the beams of the more slowly moving particles produced by lower voltages
Magnetic field strength. stronger fields deflect a given beam more than weaker fields
masses of the particles. because of their inertia, heavier particles are deflected less than lighter particles that carry the same charge
charges on the particles. particles with higher charges interact more strongly with magnetic fields and are thus deflected more than particles of equal mass with smaller charges
1 amu is exactly 1/12 of the mass of a carbon-12 atom
the atomic number Z, is an integer = the number of protons in the nucleus of an atom of the element. Also = number of electrons in a neutral atom. is the same for all atoms of an element
the mass number A, is an integer = sum of the number of protons and neutrons in the nucleus of an atom of a particular isotope of an element. different for different isotopes of the same element
the atomic weight the weighted average of the masses of its isotopes. Atomic weights are fractional numbers
Created by: tilleryc



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards