A set of students were asked to draw the electron spin diagram and write the electron configuration for the element silicon. Their answers are in the 'show your work' section below.

Examine the three answers in the 'show your work' box. Using the red/orange pen feature, grade their responses.

Warm up #2

Two new words we will start using today are Group and Period.

Using the image above, pick the best description for each

Consider the definition of 'valence electron' above.

How might you be able to determine then number of valence electrons in an atom by looking at the electron configuration for an element?

Hint: Here's a screenshot from Mrs. Hanson's video about electron configurations:

Group 1 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 2 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 13 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 14 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 15 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 16 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 17 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

Group 17 Elements

First, identify the electron configuration and number of valence electrons for the following elements.

Next, circle the elements on the periodic table.

What do you notice about the electron configurations and number of valence electrons for elements that are in the same group on the periodic table?

Use the periodic table above to put the following elements in order from fewest number of valence electrons to greatest number of valence electrons.

1. Xenon
2. Tin
3. Barium
4. Gallium
5. Bismuth
6. Iodine
7. Tellurium
8. Rubiduim

For each element listed below:

1. Circle the valence electrons on the electron configurations (in the 'show your work' box')
2. Circle the elements on the periodic table.
3. Match the elements with their number of valence electrons

Consider your answers to #14. Do electrons in d orbitals ever count as valence electrons? Why or why not?

Consider your answer to #14. In general, how many valence electrons do elements in the d block have?

Play with the simulation for a few minutes using the Atom screen. Write down three new things you notice as you play with the simulation.

What is the difference between a neutral atom and an ion?

Using what you learned from the simulation, define the term 'ion' in your own words.

Use the simulation to build stable atoms (He) or ions (Li, Be, and B). Draw the atoms or ions in the 'show your work' area, then identify the number of protons and electrons in the atom/ions.

(You may simply write the number of protons and neutrons in the nucleus, but please draw the electrons!)

What do you notice about the number of electrons in Li+, Be+2, B3+, and He?

Think about your answer for #21. Why do you think lithium always forms a +1 ion, beryllium always forms a +2 ion, and boron always forms a +3 ion?

Use the simulation to build stable atoms (Ne) or ions (F, O, and N). Draw the atoms or ions in the 'show your work' area, then identify the number of protons and electrons in the atom/ions.

(You may simply write the number of protons and neutrons in the nucleus, but please draw the electrons!)

What do you notice about the number of electrons in F-, O2-, N3-, and Ne?

Think about your answer for #24. Why do you think fluorine always forms a -1 ion, oxygen always forms a -2 ion, and nitrogen always forms a -3 ion?

Complete the table below to show how the ions listed form

Consider the ions in #26. How can you calculate the charge of an ion?

Using the periodic table above, complete the table below to summarize the patterns between ions that form and the location of elements on the periodic table. The first row is done for you.

Hint: for the 'Will atom gain or lose electrons?' column, consider the number of electrons the atom has and the number of electrons that would need to be lost or gained in order to create an ion. For example, it is far easier for a lithium atom to lose one electron than it is to gain seven.)

Label the smaller periodic table below with the charges that the ions form for each of the groups shown.

Elements in groups 1, 2, and 13 often form cations, while elements in groups 15, 16, and 17 often form anions. Considering this, which of the following are the best definitions for cation and anion?

First, complete the table in the 'show your work' box. You must complete EVERY box, not just the colored boxes!

Next, match the colored boxes with the number that you wrote in the box.

Draggable item	arrow_right_alt	Corresponding Item
	arrow_right_alt	cation
	arrow_right_alt	1 gained
	arrow_right_alt	5
	arrow_right_alt	lose or gain
	arrow_right_alt	17
	arrow_right_alt	3
	arrow_right_alt	Ge+4 or Ge-4

First, complete the table in the 'show your work' box. You must complete EVERY box, not just the colored boxes!

Next, match the colored boxes with the number that you wrote in the box.

Draggable item	arrow_right_alt	Corresponding Item
	arrow_right_alt	82
	arrow_right_alt	103
	arrow_right_alt	27
	arrow_right_alt	+2
	arrow_right_alt	70
	arrow_right_alt	19
	arrow_right_alt	79