Electron Energy Levels Notes mass of an atom = the # of p+ and n in the nucleus. size of an atom depends on the # and arrangement of e-. Start here

Electron Energy Levels Draw this E = Energy level e- = electron

Electron Energy Levels Each energy level can hold a limited # of electrons. Level 1 → 2 e- Level 2 → 8 e- Level 3 → 18 e- Level 4 → 32 e- Level 5 → 50 e-

Energy levels are broken up into sub-levels. There are 4 sub-levels: s, p, d, and f

Electron Energy Levels Each sub-level can hold a limited # of e- s level can hold up to 2 e- p level can hold up to 6 e- d level can hold up to 10 e- f level can hold up to 14 e-

# of electrons in each sub-level Total electrons in energy level 5.1 Energy Level # of sublevels Letter of sublevels # of electrons in each sub-level Total electrons in energy level 1 s 2 s p 6 8 3 s p d 10 18 4 s p d f 14 32 Next year move this slide to beginning.

Electron Configuration Symbols # of e- in sub level 1s2 Energy Level Sub Level (s, p, d, f )

Let’s draw some atoms! Need your periodic table! Helium Atomic # = 2 mass = 4 p+ = 2 n = 2 e- = 2 2e- 2 p+ 2 n Electron Configuration = 1s2

Let’s draw some atoms! Need your periodic table! Carbon Atomic # = 6 mass = 12 p+ = 6 n = 6 e- = 6 4e- 2e- 6 p+ 6 n Electron Configuration = 1s2 2s2 2p2

Let’s draw some atoms! Need your periodic table! Oxygen 6e- Atomic # = mass = p+ = n = e- = 8 16 8 8 8 2e- 8 p+ 8 n Electron Configuration = 1s2 2s2 2p4

Let’s draw some atoms! Need your periodic table! Neon 8e- Atomic # = mass = p+ = n = e- = 10 20 10 10 10 2e- 10 p+ 10 n Neon has a full outer e- level = very stable Electron Configuration = 1s2 2s2 2p6

Let’s draw some atoms! Need your periodic table! Sodium 1e- Atomic # = mass = p+ = n = e- = 11 23 11 12 11 8e- 2e- 11 p+ 12 n Sodium has nearly empty outer shell = wants to combine with other atoms Electron Configuration = 1s2 2s2 2p63s1

Let’s draw some atoms! Need your periodic table! Silicon 4e- Atomic # = mass = p+ = n = e- = 14 28 14 14 14 8e- 2e- 14 p+ 14 n Electron Configuration = 1s2 2s2 2p63s23p2

# of electrons in each sub-level Total electrons in energy level 5.1 Energy Level # of sublevels Letter of sublevels # of electrons in each sub-level Total electrons in energy level 1 s 2 s p 6 8 3 s p d 10 18 4 s p d f 14 32 Next year move this slide to beginning.

Let’s draw some atoms! Need your periodic table! Argon 18 p+ 22 n 2e- 8e- Atomic # = mass = p+ = n = e- = 18 40 18 22 18 Argon has full p-level = stable Electron Configuration = 1s2 2s2 2p63s23p6

Let’s draw some atoms! Need your periodic table! Zinc Atomic # = mass = p+ = n = e- = 30 65 30 35 30 Electron Configuration = 1s22s22p63s23p63d104s2

Add to your Table of Contents! https://vimeo.com/12772132 (fireworks)