Name _________________________________________________________________________________ Date ________________
Periodic Trends Worksheet
Directions: Use your notes to answer the following questions. Use COMPLETE SENTENCES for your answers.
1. Rank the following elements by increasing atomic radius:
2. carbon, aluminum, oxygen, potassium. C O
Al
K
O C Al K
3. Rank the following elements by increasing atomic radius : sulfur, oxygen, neon, aluminum.
4. Why do elements in the same family generally have similar properties?
5. Indicate whether the following properties increase or decrease from left to right across the
periodic table.
a. atomic radius (excluding noble gases)
6. What trend in atomic radius occurs down a group on the periodic table? What causes this
trend?
7. Circle the atom in each pair that has the largest atomic radius.
a. Al or B
b. Na or Al
c. S or O
d. O or F
e. Br or Cl
f. Mg or Ca
Neon, Aluminium, Sulfur, Oxygen
Because they have same valence shell electrons arrangement.
decreases
The trend that occurs in atomic radius down a group increases because
energy level shells are added.
