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


Radioactivity The spontaneous emission of particles (example; alpha or beta) or rays (gamma) from unstable atomic nuclei
Ion A charged atom or group of atoms; bonded together with an electric charge
Isotope Having the same number of protons but different number of neutrons
Orbital A volume of space in an atom that is occupied by one or two electrons
Electron configuration The arrangement of an atom's electrons in its energy levels
Valence electron Electrons in the outermost shell of an atom
Octet rule Atoms tend to have eight electrons in the outermost shell, or try to
Lone Pair A pair of unshared electrons in the valence shell of an atom: nonbonding pair
Electronegativity The attraction of an atom in a molecule or a bonding pair of electrons
Quantum A discrete unit of energy: one photon
Who discovered radioactivity and why doing what? Becquerel; He was experimenting with fluorescence and sunlight when he used uranium and if fogged his photographic film without any sunlight. Which meant radiation from the uranium caused it.
Particles emitted during decay Positives, negatives, neutrals
Proton positive charged particle with the mass of 1 u located in the nucleus.
Neutron Neutral particle with the mass of 1 u located in the nucleus
Electron negative charged particle with the mass of 1/1837 u located outside the nucleus
atomic number the number of protons in the nucleus
Bohr's explanation of line spectra Electrons cannot have any amount of energy, but specified amounts with a specified value called energy levels. Jumping to the next level by absorbing a quantum of energy. By giving up a quantum it can go to the lower energy level.
Bohr's definition of quantum a tiny unit of energy whose value depends on the frequency of radiation
energy level a specified energy value for an electron. Same as today
Ground state Atoms with their electrons at their situated state
excited state Source supplied energy; causing the electrons to jump energy levels
Why atoms share electrons Each atom wants to fill it's octet
Created by: MrScheib



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