Do Now & Announcements Work on Do Now & take out notes from yesterday

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Presentation transcript:

Do Now & Announcements Work on Do Now & take out notes from yesterday I will collect your labs tomorrow Unit 4 Test THURS 10/9 Unit 3 Quest Corrections due FRI 10/10

1s22s2 [He]2s2 K [Ar]4s1

Valence Electrons The electrons in the outermost shell or highest energy level Total number of electrons in the highest energy s and p orbitals!

1s22s2 [He]2s2 2s2 K [Ar]4s1 4s1 Te 1s22s22p63s23p64s23d104p65s24d105p4 [Kr]5s24d105p4

Electronic Battleship

Noble Gases: Group 18 Have octet=full valence (outermost) shell All elements want to be a noble gas (so freaking bad). In other words, all elements want to have a full valence shell Remember: “8 IS GREAT!” Exception: helium: it only has 2 valence electrons

Obtaining a Noble Gas Electron Configuration Elements can lose or gain electrons in order to get a noble gas’ electron configuration Depending on the element, sometimes it is “easier to lose electron(s)”, and sometimes it is “easier to gain electron(s)”

Getting a Full Outer Shell Lithium (Li) 1s22s1 3P + 4N ADD 7 ELECTRONS REMOVE 1 ELECTRON 3P + 4N 3P + 4N 1s2 1s22s22p6 Which way is easier?

Getting a Full Outer Shell Fluorine (F) 1s22s22p5 9P + 10N ADD 1 ELECTRON REMOVE 7 ELECTRONS 9P + 10N 9P + 10N 1s22s22p6 1s2 Which way is easier?

5s25p6

Isoelectronic Species Elements/ions that have the same number of electrons 11+ - 12+ Oxygen ion O2- 1s22s22p6 Fluorine ion F1- Sodium ion Na1+ Magnesium ion Mg2+ 8+ 9+ 10+ Neon atom Ne p = 8 n = 8 e = 10 p = 9 n = 9 p = 10 n = 10 p = 11 n = 11 p = 12 n = 12