1 / 10

Journal Entry

Journal Entry. Describe what you know about how electrons are arranged inside atoms. Keep writing until I ask you to stop. Atomic Structure. Drawing Atomic Models. Step 1. Re-number the groups (columns) from 1 to 8, ignoring transition metals. 83 p+. Step 2.

salali
Télécharger la présentation

Journal Entry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Journal Entry • Describe what you know about how electrons are arranged inside atoms. • Keep writing until I ask you to stop.

  2. Atomic Structure Drawing Atomic Models

  3. Step 1 • Re-number the groups (columns) from 1 to 8, ignoring transition metals.

  4. 83 p+ Step 2 • Find the number of protons (from the atomic number) • Bismuth: 83 • Draw those into the nucleus.

  5. 83 p+ 126 n Step 3 • Round the average atomic mass to the nearest whole number and use that as the mass number. • A= 209 • Subtract the atomic number from it to get the number of neutrons. • #n = 126 • Draw those into the nucleus.

  6. 83 p+ 126 n energy levels: 1st 2nd 3rd 4th 5th 6th Step 4 • Look at the period number of the row that the element is in. It tells you how many energy levels there are. • Period # = 6 • Draw that number of rings around the nucleus.

  7. 83 p+ 126 n 5e- energy levels: 1st 2nd 3rd 4th 5th 6th Step 5 • Look at the new group number to tell how many electrons are in the outermost energy level. • Group # = 5 • Fill in the number of electrons in that outer level.

  8. 2e- 8e- 18e- 5e- 83 p+ 126 n energy levels: 1st 2nd 3rd 4th 5th 6th Step 6 • Starting in the 1st energy level, fill in the maximum number of electrons in the 1st, 2nd, and 3rd until you reach the outermost. • 1st = 2e- 2nd = 8e- 3rd = 18e-

  9. Step 7 • Find the number of electrons needed to finish the diagram and add those into the 4th-6th energy levels using 8, 18 and 32 electrons only. • Find the combination that adds electrons to all levels left and still adds up to the correct number total. • The inner level(s) should always have more than the outer.

  10. 2e- 8e- 18e- 32e- 18e- 5e- 83 p+ 126 n energy levels: 1st 2nd 3rd 4th 5th 6th Step 7 • already added to diagram (2 + 8 + 18) + 5 = 33e- • Need to add to diagram 83 – 33 = 50 e- in 4th and 5th • 18 + 32 = 50 • 32 must be in 4th and 18 must be in 5th.

More Related