Atomic Size and Radius Concepts

The video tutorial explains the concept of atomic radius and how it varies across the periodic table. It highlights that as you move down a group, atomic size increases due to added energy levels, while moving across a period results in smaller atomic sizes. The video identifies helium as the element with the smallest atomic radius. Dr. B concludes by summarizing the key points discussed.

What is the main focus when discussing atomic radius?

• The charge of the atom

• The mass of the atom

• The size of the atom

• The color of the atom

Which element is known to have the largest atomic radius?

• Cesium

• Oxygen

• Hydrogen

• Helium

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

• It remains the same

• It decreases

• It increases

• It fluctuates

How does atomic size change as you move across a period from left to right?

• It doubles

• It increases

• It decreases

• It remains constant

Which element has the smallest atomic radius?

• Beryllium

• Boron

• Lithium

• Helium