Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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 3.1-3.7

QuestionAnswer
pure substances type of matter that has a definite composition
elements simplest pure substances because they are composed of only are kind of atom
compounds two or more elements in the same proportion
mixtures two or more substances that are pysically mixed, but not chemically combined
types of mixtures homogeneous & heterogeneous
homogeneous mixture aka solution; composition is uniform throughout a sample (salt water)
heterogeneous mixtures components do not have a uniform composition throughout the sample (oil & water, raisins in a cookie)
chemical symbols one- or two-letter abbreviations for the names of the elements
physical properties characteristics that can be observed or measured w/o affecting the identity of an element (shape, color, odor, taste, density, hardness, melting point, boiling point)
periodic table the arrangement of elements created by Dmitri Mendeleev
period horizontal rows in the periodic table
group vertival columns on the periodic table
atom the smallest particle of an element that retains the characteristics of that element
nucleus positively charged region at the center of the atom
amu (atomic mass unit) used in expressing masses of neutrons, protons, ect
atomic number equal to the protons
mass number protons + neutrons= mass number
isotopes atoms of the same element that have different numbers of neutrons
atomic mass average of the mass of isotopes of an elements
valence electrons outermost electrons
group numbers (1A-8A); indicates the number of valence electrons in an element
atomic radius the distance from the nucleus to the valence electrons
ionization energy energy needed to remove the least tightly bounded electron from an atom in the gaseous state.
Created by: adiya117
Popular Chemistry sets

 

 



Voices

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:
Retries:
restart all cards