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.

Remove Ads
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

Chapter Three

Atom the smallest component of an element
Plum-pudding Model The plum pudding model of the atom was proposed by J. J. Thomson
Gold-Foil Experiment Performed by Rutherford. Discovered that the Atom is mostly made of empty space and is positively charged
Orbitals Where Electrons are located
Nucleus Cotains the atoms Protons (+) and neutrons, mostly empty space.
Proton is one amu, positively charged
Electron Is Negatively charged, has a very small mass.
Mass Number The sum of the number of Protons and nuetrons of an atoms nucleus
Atomic Number representing the relative position of an element in the periodic table, is equal to the number of protons and electrons in the atom
Ion a particle that is electrically charged (positive or negative); an atom or molecule or group that has lost or gained one or more electrons
Isotope one of two or more atoms with the same atomic number but with different numbers of neutrons
Atomic Mass the mass of an atom of a chemical element expressed in atomic mass units
Valence Electrons In chemistry, valence electrons are the outermost electrons of an atom,
Octet when an orbital has 8 electrons in it, it is called dan octet
Excited State Excitation is an elevation in energy level above an arbitrary baseline energy state
Ionization Energy The amount of energy needed to remove an electron from a given kind of atom
Electron Affinity The Electron affinity of a molecule or atom is the energy change when an electron is added to the neutral species to form a negative ion.
Electronegativity the tendency of an atom or radical to attract electrons in the formation of an ionic bond
Created by: Michaela.Kinney