Acc The Elusive Electron Read N’ Fill Along Name: _______________________________ Per ______
An electron is a _______________ and a ________________
An electron inhabits a “________________________________” NOT a circular orbit. The densest parts of the cloud are where the electron is likeliest to “be”
Page 29 and 30 talk about electrons absorbing and releasing energy. What happens when an electron absorbs energy?
The electron configurations within each energy level are called orbitals.
What does it mean by an atom’s ionization energy (pg 31)? To _______________ an
_____________ completely.
Different sublevels are called ____, ______, d and f, and each orbital can hold up to
_________________________ (pg 32).
On page 32, draw the s and three p orbitals:
Question! How many electrons can the s sublevel hold? _____ p sublevel? _____.
*Take a look at the orbital diagram framework on the right of page 33. Good job! 
Figure out and write the electron configuration of Neon: _________________
Sketch the atomic picture of Neon’s orbital on page 34 (and check your electron config!):
If you compare these atoms with those on the previous page, you will see that elements 11-18 are like “_______________________________” to elements 3 – 10. Each of the atoms on this page has an outer shell __________________ to that of the atom just eight elements behind it! (Bottom of page 35). All elements with the same outer shell electron configurations have similar properties. This means that elements in the same group (columns) have similar properties.

Practice Problem:
Write the electron configuration and draw the Bohr model and the orbital diagram for Sulfur (unless otherwise noted – it’s an atom!).
*If you need help with the orbital diagram  check the framework on
Electron Configuration: ________________________________ page 33: this is the boxes:
Noble Gas Configuration: ___________________ Orbital Diagram:
Bohr Model:
What would change if this was a Sulfur ion? How would that change the above?
Directions: Return the first comic handout and pick up the second one!
The Outermost Electrons
Moving left to right along a row, the number of outer electrons goes _______
The outer electrons are called _____________________________ and are involved and account for most chemical ___________________ (this is where chemical bonding comes into play!).

Group 1 has 1 valence electron, Group 2 has 2, skip the middle section, Boron’s group has 3 valence electrons, and the last group on the periodic table has 8.
Question: Circle the one that has more valence electrons: Hydrogen or Argon
Atomic Size
Moving from left to right, atoms get _________________ and moving down a column, they get
__________________.
Why? Moving to the right: The ___________________ charge of the nucleus pulls electrons closer in going down a column. (NUCLEAR PULL! More protons in the nucleus pulls the electrons, so the atom becomes smaller).
Moving down: The outer electrons are in _________________ shells, so are far away from the nucleus. (So more orbitals make it bigger).
Question: Circle the one that has a bigger atomic size: Magnesium or Strontium

Ionization Energy
What is ionization energy?
Group 1 elements have a ______________ valence electron far away from the nucleus. So it’s easy to take off.
These elements would have ________ ionization energies.
As you move right across the rows, electrons are closer to the nucleus, which holds them more
_______________. So these are harder to take off, which means these elements would have ____________
(high/low) ionization energies.
Question: Which has the higher ionization energy
(in other words harder to take the electron from)
: Sodium or Francium
Electron Affinity
What is electron affinity?
Atoms toward the right side of the periodic table tend to have ________________ electron affinity.
Why? They have a smaller diameter (so electrons can get _______________), big pull from the
__________________ and an unfilled orbital or two.
What group is the EXCEPTION to going towards the right side? ________________________
Metals tend to _____________________________ electrons freely, whereas nonmetals generally prefer to
____________ or __________________ electrons.
Question: Circle the one that is ductile (can be made into a wire): Metal or Non-metals
The last group of the periodic table is uniquely strange. Because they live far to the right, they have
___________________________________________________, so they don’t easily make cations. They also have ___________ electron affinity because their outer orbitals are ______________, so they don’t make anions either!
Question: Which noble gas (or last column group) does not have 8 valence electrons? _______________
In fact, they rarely react with anything. They just float around in an unconnected, standoffish, gaseous state and so are known as noble gases.
Why do the “common elements” want to be like the noble gases?
We call this the ____________________________ or otherwise known as the octet rule.
Metals tend to ___________ electrons. Nonmetals tend to _____________ them.
Question: Which of the following would rather gain electron(s): Magnesium or Oxygen