Atomic Radius Trends in Periodic Table

The video tutorial explains how to determine which atom has a larger atomic radius by using the periodic table. It compares oxygen and magnesium, showing that magnesium is larger due to its position lower on the periodic table. The tutorial discusses trends in atomic radius, noting that atomic size increases down a group and decreases across a period. Both trends confirm that magnesium has a larger atomic radius than oxygen.

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

• Oxygen and Magnesium

• Sodium and Chlorine

• Hydrogen and Helium

• Carbon and Nitrogen

What is the trend in atomic radius as you move down a group in the periodic table?

• It fluctuates

• It decreases

• It remains the same

• It increases

Why is magnesium expected to have a larger atomic radius than oxygen?

• Magnesium is higher up in the periodic table

• Magnesium is a transition metal

• Magnesium is lower down in the periodic table

• Magnesium is further to the right in the periodic table

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

• It increases

• It decreases

• It remains constant

• It doubles

Which element is further to the right on the periodic table, oxygen or magnesium?

• Oxygen

• Magnesium

• Neither, they are in the same row

• Both are in the same column

Based on periodic trends, which element is expected to have a smaller atomic radius?

• Oxygen

• Magnesium

• It cannot be determined

• Both have the same size