Periodic Trends

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 ionization energy to largest ionization energy:

, , , ,

1c. Place the elements above in order from smallest electronegativity to largest electronegativity:

, , , ,



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 ionization energy to smallest ionization energy:

, , ,

2c. Place the elements above in order from largest electronegativity to smallest electronegativity:

, , ,



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 smallest ionization energy to largest ionization energy:

, , ,

3c. Place the elements above in order from smallest electronegativity to largest electronegativity:

, , ,



SET 4: radon, cesium, platinum, tungsten


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

, , ,

4b. Place the elements above in order from smallest ionization energy to largest ionization energy:

, , ,

4c. Place the elements above in order from smallest electronegativity to largest electronegativity:

, , ,



SET 5: zirconium, rubidium, strontium, yttrium


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

, , ,

5b. Place the elements above in order from smallest ionization energy to largest ionization energy:

, , ,

5c. Place the elements above in order from largest electronegativity to smallest electronegativity:

, , ,



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


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

, , ,

6b. Place the elements above in order from largest ionization energy to smallest ionization energy:

, , ,

6c. Place the elements above in order from largest electronegativity to smallest electronegativity:

, , ,