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

Lesson 4.1 Atom Laws

Supporting Lesson 4.1 Concepts and Vocab ( Chem 1)

TermDefinition
Aristotle Greek philosopher that thought that all matter was composed of 4 elements (water, earth, wind, fire)
Democritus Greek philosopher that said all matter is made of tiny particles called "atomos" or atoms that were indivisible and unchangeable
atoms the smallest unit of matter that still retains the properties of an element
scientific law a concise statement that summarizes the results of many observations and experiments that describe or predict natural phenomena
element substance that cannot be broken down into a simpler substance by ordinary chemical means.
compound substance formed by the chemical combination of two or more elements which have different properties than the individual elements that form them.
proportion the relationship of one thing to another, a ratio that shows the patterns between two things.
Law of Multiple Proportions Whenever the same two elements form more than one compound, the different masses of one element that combine with the same mass of the other element are in the ratio of small whole numbers.
Law of Multiple Proportions Example Carbon and Oxygen can make different compounds, In carbon dioxide (CO2) there is exactly twice as much oxygen present as there is in the carbon monoxide(CO)
Law of Conservation of Mass Matter is not created nor destroyed in any chemical or physical change
reactants A chemical substance that is present at the start of a chemical reaction
products The elements or compounds produced by a chemical reaction.
conserved saved, not lost
Law of Conversation of Mass Example 20 g A + 20 g B => 40 g AB
definite certain, specific, unchanging
Law of Definite Proportions a given chemical compound always contains the same elements in the exact same proportions by mass.
Law of Definite Proportions Example Water samples big or small always have Oxygen and Hydrogen within a 8:1 mass ratio
Created by: Sara_Kellogg21
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