Welcome to StudyStack, where users create FlashCards and share them with others. Click on the large flashcard to flip it over. Then click the green, red, or yellow box to move the current card to that box. Below the flashcards are blue buttons for other activities that you can try to study the same information.
Reset Password Free Sign Up

Free flashcards for serious fun studying. Create your own or use sets shared by other students and teachers.

Remove ads
Don't know (0)
Know (0)
remaining cards (0)
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

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

Chemistry Ch 1

What did Max Planck do? Developed the first quantum theory, proposed that energy is emitted from matter as electromagnetic radiation in discrete bundles called quanta.
What is the equation derived by Planck? E=hf, where h is planck's constant 6.626 x 10^-34 Js, f is the frequency of radiation.
What are Bohr's assumptions about a hydrogen atom? That it is a central proton and an electron traveling in circular orbit, and that the centripetal force on the electron is the electrical force between the proton and electron.
How does Bohr use Planck's quantum theory to correct older assumptions about electrons? He placed restrictions on the value of the angular momentum of the electron revolving around the hydrogen nucleus. He predicted that the angular momentum of an electron is quantized according to L=nh/2π.
What is the electron energy equation derived by Bohr? E=-Rh/n^2 (rh is the Rydberg constant, 2.18x10^-18 J/electron).
Created by: schoe

bad sites Copyright ©2001-2016  StudyStack LLC   All rights reserved.