Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards




share
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

Chem Vocab Definitio

Chapter 4

TermDefinition
Bohr Model The scientist responsible for the Solar System model of the atom: the first person to place electrons into energy levels
Alkali Metal The elements of Group I of the Periodic Table
Democritus Ancient philosopher who coined the term "atomos"
Groups/Family A horizontal row of elements in the periodic table
Elements that are chemically similar to each other
Noble Gases The elements of Group VIII of the Periodic Table
John Dalton Credited with the first scientifically-based theory about the atom [Theory with 5 postulates]
Mass Number The sum of the numbers of protons and neutrons in the nucleus of an atom
James Chadwick Credited with the discovery of the neutron
Oxidation Number Number that indicates the number of atoms or polyatomic ions in a formula
Isotope An atom that has the same number of protons As other atoms of the same element do but that has a different number of neutrons
J.J. Thomson Scientist who discovered the electron and developed the 'Plumb Pudding Model" of the atom
Equivalent to the charge on an atom or ion
Cation A positively charged ion
Halogens The elements of Group VII of the Periodic Table
Scientist who discovered that the atom is mostly empty space and has a small, dense nucleus
Anion A negatively charged ion
Atomic Number This is the number of protons in an atom or an ion
Covalent Compounds A compound composed only of non-metals
Diatomic Elements 7 elements that always occur in pairs in nature; HONClBrIF
Alkaline Earth Metal The elements of Group II of the Periodic Table
Polyatomic Ion A group of covalently bonded atoms that have a charge
Valence Electrons Particles found in the outermost energy level of the atom. The particle that directly takes part in bonding
Ionic Compound Compound composed of a metal and a nonmetal
Nucleus An atom's central region
Valence ? According to the modern theory, a region in an atom where there is a high probability of finding electrons.
Created by: skhan765