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

The Periodic Table

an element is a substance that cannot be split up into simpler substances by chemical means.
a triad is a group of three elements with similar chemical properties in which the atomic weight of the middle element is approximately equal to the average of the other two.
Newlands' Octaves are groups of elements arranged in order of increasing atomic weight, in which the first and the eight element of each group have similar properties.
Mendeleev's Periodic Law: when elemnets are arranged in order of increasing atomic weight (relative atomic mass), the properties of the elements vary periodically.
The atomic Number of an atom is the number of protons in the nucleus of that atom.
The modern Periodic Table is an arrangement of elements in order of increasing atomic number
elements arranged in order of increasing atomic number: the properties of the elements vary periodically.
the mass number of an element is the sum of the number of protons and neutrons in the nucleus o an atom of that element.
Isotopes are atoms of the same element (have the same atomic number) that have different mass numbers due to the different number of neutrons in the nucleus.
Relative atomic mass -the average of the mass of the isotopes of the elemnet -as they occur natually -taking their abundences into account -expressed on a scale in which the atoms of the carbon-12 isotopes have a mass of exactly 12 units.
the aufbau Principle states that when building up the electronic configuration of an atom in its ground state, the electrons occupy the lowest available energy level.
Hund's rule of Maximum Multiplicity states that when two or more orbits of equal energy are available, the electrons occupy them simply before filling them in pairs.
The Pauli Exclusion principal states that no more than two elecrtons may occupy an orbital and they must have opposite spin.
Created by: saoirse sarah



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