CH 301 Ch12 notes part 3

CH 301 Ch12 notes part 3 - CH301 Chapter 1 Notes: Part 3:...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CH301 Chapter 1 Notes: Part 3: Trends on the Periodic Table. Electron configurations for the elements underline important properties of the periodic table. This enables us to predict types of bonding and structures of molecules. Similar groups of the elements are classified and named based on their electron configurations . He 1s 2 Ne [He] 2s 2 2p 6 Ar [Ne] 3s 2 3p 6 Kr [Ar] 4s 2 4p 6 Xe [Kr] 5s 2 5p 6 Rn [Xe] 6s 2 6p 6 Example: The NOBLE GASES : All are very unreactive. This unreactivity is due to their similar electronic structures. Note every one after He ends with n p 6 . This is a very stable configuration! Representative Elements: (s and p elements) •elements in A groups on periodic chart •their “last” electron is in an outermost* s or p orbital. •have fairly regular variations in their properties. s block elements tend to react with water. Often vigorously! The p -block crosses from metal to nonmetal d -Transition Elements: •in ‘B’ groups on the table •also called transition metals. •electrons being added to lower (inner)* d orbitals (n s (n-1) d configurations) •exhibit smaller row-to-row variations than representative elements * •make IONS by first losing the outer s electrons, then some (varies) of the inner d electrons. •Form more than one kind of ion . f - transition metals : •also called inner transition metals. •electrons are being added to lower (inner) f orbitals * . (have n
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/02/2010 for the course CH 50985 taught by Professor Sarasutcliffe during the Fall '10 term at University of Texas at Austin.

Page1 / 3

CH 301 Ch12 notes part 3 - CH301 Chapter 1 Notes: Part 3:...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online