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.
Didn't know it?
click below
 
Knew it?
click below
Don't know (0)
Remaining cards (0)
Know (0)
0:00
share
<embed>
apps
export
edit
print
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

Jerry/s Unit 2 Study

Unit 2

QuestionAnswer
1.) Who used the "Gold Foil" experiment with alpha particles? Rutherford
2.) Who discovered there are external negative electrons? Thomson
3.) Who was the first person to suggest an atom? Democratis
4.) Who was responsible for discovering the nucleus? Rutherford
5.) Who was responsible for proving that atoms existed, and came up with 4 postulates? Dalton
6.) Give the locations of the protons, neutrons, and electrons in an atom. Electrons- e- cloud, outside of nucleus. Protons and Neutrons- inside nucleus.
7.) Which is/are the largest, and smallest: protons, neutrons, or electrons? Protons and Neutrons are BIG. Electrons are SMALL
8.) Why ISN"T the mass number for oxygen 15.9994? Protons plus neutrons will give you the mass number. 15.9994 is the average mass.
9.) How do you find the number of neutrons in an atom? Mass-protons=neutrons
10.) How many groups are on the periodic table? 18
11.) How many rows are in the periodic table? 7
12.) Are groups horizontal or vertical? Vertical
13.) Are rows horizontal or vertical? Horizontal
14.) Look at your periodic table for #'s 14-16. How many protons and neutrons are in: 172Lu? Protons=71 Neutrons=101
15.) How many protons and neutrons are in: 175Lu? Protons=71 Neutrons=104
16.) How many protons and neutrons are in: 179Lu? Protons=71 Neutrons=108
Created by: Jstewart02005
 

 



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then tap the card to flip it. If you knew the answer, tap the green Know box. Otherwise, tap the red Don't know box.

When you've placed seven or more cards in the Don't know box, tap "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just tap 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