Atomic Radius Trends in Periodic Table

The video tutorial explains how to determine which atom is larger between calcium and potassium using the periodic table. It highlights that potassium has a larger atomic radius than calcium. The tutorial discusses the trend of atomic radius increasing down groups and decreasing across periods. The conclusion confirms that potassium is the larger atom due to its position on the periodic table.

What is the first step in determining which atom is larger between calcium and potassium?

• Refer to the periodic table.

• Look at their electron configurations.

• Check their atomic numbers.

• Measure their mass.

How does the atomic radius change as you move down a group in the periodic table?

• It fluctuates randomly.

• It decreases.

• It remains the same.

• It increases.

What happens to the atomic radius as you move across a period from left to right?

• It doubles.

• It remains constant.

• It decreases.

• It increases.

Why is potassium larger than calcium?

• Calcium is a transition metal.

• Potassium is further to the left on the periodic table.

• Calcium has a higher atomic number.

• Potassium has more protons.

Which of the following statements is true about atomic size trends?

• Atoms get smaller as you move down a group.

• Atoms get larger as you move across a period.

• Atoms get smaller as you move down a group.

• Atoms get larger as you move down a group.