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

Periodic Table Video

Define allotrope Elements that come in different forms
Example of an allotrope Carbon
Name 9 physical characteristics of elements color, odor, state, solubility, malleability, ductility, freezing point, melting point, melting point
Who was given credit for creating the periodic table? A Russian scientist named Dmitri Mendeleev
Why was Dmitri Mendeleev given credit for discovering the table? He predicted almost accurate properties for elements that had not yet been discovered.
What was Mendeleev's table based on? Increasing atomic mass
What is the current table based on? Increasing atomic number
Who changed the table? When? A British scientist named Henry Moseley in 1913
Who was the German scientist who was working on creating the table around the same time as Mendeleev? Lothar Meyer
Define atomic number The number of protons in an atom's nucleus
Define atomic mass The number of neutrons and protons (nucleons) in an atom's nucleus.
What are vertical columns in the table called? Groups or families
How many families are there in the table? 18
What are the horizontal rows in the table called? Periods
How many periods are in the table? 7
What is Group 1 called? alkali metals
What is Group 2 called? alkaline earth metals
What is Group 17 called? halogens
What is Group 18 called (both names)? inert gases or noble gases
What are elements located left of the staircase called? metals (besides hydrogen)
What are the elements located to the right of the staircase called? non-metals
What are the elements that border the staircase called? metalloids (besides aluminum and polonium)
How many metalloids are there? 7
What are the large group of elements in the center of the table (Groups 3-12) called? transition metals
What are the elements located at the bottom of the periodic table called? rare earth metals
How many elements are there? 118
Created by: 16bcleary



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