Atomic Radius Trends and Comparisons

The video tutorial explains how to determine which of two atoms, chlorine (CL) or magnesium (Mg), has a larger atomic radius. It discusses the trends in atomic radius on the periodic table, noting that atomic radius increases down a group and decreases across a period. Since CL and Mg are in the same period, the tutorial concludes that Mg has a larger atomic radius than CL based on these trends.

Which two elements are being compared for their atomic radius in the video?

• Hydrogen and Helium

• Sodium and Potassium

• Chlorine and Magnesium

• Oxygen and Sulfur

What happens to the atomic radius as you move down a group in the periodic table?

• It increases

• It fluctuates

• It decreases

• It remains the same

Why doesn't the trend down a group help in comparing chlorine and magnesium?

• They have the same atomic number

• They are transition metals

• They are in different groups

• They are in the same period

What is the trend for atomic radius as you move across a period?

• It increases

• It decreases

• It doubles

• It remains constant

Based on the periodic trends, which element has a larger atomic radius?

• Both are equal

• Magnesium

• Chlorine

• Cannot be determined

What is the main conclusion about the atomic radius of magnesium compared to chlorine?

• Both have the same size

• Magnesium is larger

• Chlorine is larger

• Magnesium is smaller