Periodic Behavior

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

SET 1: lithium, cesium, potassium, sodium, rubidium


1a. Place the elements above in order from smallest atomic radius to largest atomic radius:

, , , ,

1b. Place the elements above in order from smallest energy needed to remove the outermost electron to the largest energy needed to remove the outermost electron:

, , , ,

1c. How many valence electrons does each element in this group possess?



SET 2: bromine, iodine, fluorine, chlorine


2a. Place the elements above in order from largest atomic radius to smallest atomic radius:

, , ,

2b. Place the elements above in order from largest energy needed to remove the outermost electron to the smallest energy needed to remove the outermost electron:

, , ,

2c. How many valence electrons does each element in this group possess




SET 3: sodium, argon, sulfur, aluminum


3a. Place the elements above in order from largest atomic radius to smallest atomic radius:

, , ,

3b. Place the elements above in order from the easiest from which to remove the outermost electron, to the hardest to remove that electron:

, , ,

3c. How many valence electrons are present in the dot notation for aluminum?




SET 4: radon, cesium, platinum, tungsten


4a. Place the elements above in order from smallest atomic radius to largest atomic radius:

, , ,

4b. How many valence electrons are present in the dot notation for radon?


4c. How many valence electrons are present in the dot notation for cesium?




SET 5: zirconium, rubidium, strontium, yttrium


5a. Place the elements above in order from largest atomic radius to smallest atomic radius:

, , ,

5b. How many valence electrons are present in the dot notation for strontium?




SET 6 (THINK!): boron, sodium, potassium, aluminum


6a. Place the elements above in order from largest atomic radius to smallest atomic radius:

, , ,

6b. How many valence electrons are present in the dot notation for boron?


6c. How many valence electrons are present in the dot notation for potassium?