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.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

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

RAD Imaging ch 2

Carlton & Adler.

What is matter? Has mass, occupies space.
How do you measure matter? In kilograms.
How do you measure energy? Joules.
How do you measure an X-ray? Electron volts (eV)
What is an atom? Smallest particle of an ELEMENT
what is an element? pure substance made of only 1 kind of atom.
what is a compound? 2 or more different elements chemically joined
what is a molecule? smallest part of a compound.
An atom is to a _____, as a molecule is to a _____. an atom is to an ELEMENT as a molecule is to a COMPOUND.
what is a mixture? Substance made of 2 or more substances, that are not chemically joined.
What is an atomic number? (Z#) distinguishes elements by number of protons in nucleus.
What is Tungstens binding energy? 69.5 keV
Explain binding energy. Closer electrons are to nucleus, stronger the binding energy. Closer shell electrons have less energy but more binding energy.
Atomic mass is? (A) equal to the number or protons and neutrons in the nucleus.
Change neutrons you get.. An isotope
Change atomic number... you change the element.
If you change electrons.. you make an ion.
If an atom gains an electron? Negative ion.
If an atom looses an electron? Positive ion.
An isotope is? An atom with the same # of protons, but different # of neutrons.
Changing what changes the element? The number of protons. Electrons and neutrons can be changed without changing the element.
What is the relationship between wavelength and frequency? wavelength up, frequency down.
Describe the end of the electromagnetic spectrum. More energy, high frequency, shorter wavelength.
Describe the beginning of the em spectrum. Low energy, low frequency, long wavelength.
How is wavelength measured? Angstroms.
How is frequency measured? Hertz.
What are the properties of an X-ray. -Electrically neutral. -Polyenergetic or heterogeneous energies. -Travel in straight lines. -Speed of light. -Ionize matter. -cause flourescence in some crystals. -Produce secondary and scatter radiation.
How are elements similar within each group on the periodic table? (8 vertical groups) Elements with the same number of electrons in outermost shell.
How are elements similar within each period on the periodic table? (7 horizontal periods) Same number of electron shells.
Tungsten has an atomic number of __? 74
Tungsten's symbol is __? W
Tungsten has how many shells? 6. K, L, M, N, O, P. (2 electrons in P)
One keV equals ___ eV? (kilo-electron volt, electron volt) 1000
As a wave, EM radiation has an associated ____ and ____. Wavelength and frequency
As a particle, EM radiation behaves as a ___. Photon, bundle of energy.
Covalent bond Sharing atoms.
Ionic bond One atom gives up one or more electrons to another atom.
Valence The number of atoms that can still be added to the outermost shell is the Valence. Describes elements ability to bond.
Created by: Zoest35