Dot Structures

Which sublevel consists of 5 orbitals A) B) C) D) s p f d

Which sublevel is made of dumbbell shaped orbitals?

A) B) C) D) s p f d

How many electrons fill the f orbitals A) B) C) D) 2 6 10 14

How many electrons fill the 3 rd main energy level?

A) B) C) D) 2 8 18 32

What is the correct electron configuration for P A) B) C) D) 1s 2 2s 2 2p 6 3s 2 3p 6 1s 2 2s 2 2p 6 3s 2 3p 4 1s 2 2s 2 2p 6 3s 2 1s 2 2s 2 2p 6 3s 2 3p 3

What is the correct end configuration for Ba A) B) C) D) 7s 2 6s 1 6s 2 5s 2

Excited Configurations  When electrons are in the excited state, their configuration will look different Ne ground 1s 2 2s 2 2p 6 excited 1s 2 2s 1 2p 6 3s 1 or 1s 2 2s 2 2p 4 3p 2

Valence Electrons      Electrons in the last main energy level These are the electrons farthest out on the atom These will interact with other atoms These are the electrons involved in chemical reactions There are a maximum of 8 valence electrons

How to find valence e   Write configuration and count electrons in last main energy level Examples: Find valence electrons for C

 How many valence electrons does P have?

 How many valence electrons does K have?

 How many valence electrons does Fe have?

 How many valence electrons does Kr have?

 How many valence electrons does Mn have?

Dot Structure     Shows valence electrons Dots are placed around the symbol of the element Max of two dots per side Must have at least one dot per side before doubling up

Draw Dot Structure C Fe Cl