Lecture 20 (Group 14 Elements, etc.)

Question 1

What is the inert pair effect?

Answer 1

the reluctance of the ns^2 electrons in the valence shell of havier main group elements to ionize.

Question 2

What is the multiple bond rule?

Answer 2

multiple bonds formed by elements below the second period are generally very weak and compounds with these bonds require substantial steric protection

Question 3

What is an oxidation state?

Answer 3

the hypothetical charge that an atom would have if all of its bonds would be purely ionic

Question 4

What is valence?

Answer 4

number of electrons involved in bonding

Question 5

What is a coordination number?

Answer 5

number of bonded atoms

Question 6

What are hypervalent compoounds?

Answer 6

Main group elements with a formal charge of more than eighth valence electrons

Question 7

Trend of E-X bond strength?

Answer 7

Bond strength decreases down the groups of the periodic table, as atomic number increases