Atomic and Ionic Radii Trends in the Periodic Table

The video tutorial covers the concepts of atomic and ionic radii, explaining how to order elements and ions by increasing radius. It begins with an introduction to the questions about atomic and ionic radii, followed by a detailed explanation of atomic radius trends on the periodic table, emphasizing the increase in size as you move left and down. The tutorial then shifts to ionic radii, focusing on isoelectronic species and how the number of protons affects ionic size. The video concludes with the correct order of elements and ions based on their radii.

Which of the following elements has the smallest atomic radius?

• Krypton

• Fluorovium

• Germanium

• Lead

What happens to the atomic radius as you move left across a period on the periodic table?

• It decreases

• It increases

• It remains the same

• It fluctuates

Which element is larger in atomic radius, Bromine or Germanium?

• Germanium

• Cannot be determined

• Bromine

• They are the same size

Which of the following elements is expected to have the largest atomic radius?

• Krypton

• Fluorovium

• Germanium

• Bromine

What is the electron configuration similarity among the given ions?

• They all have different configurations

• They all have neon electron configuration

• They all have oxygen electron configuration

• They all have sodium electron configuration

In the context of ionic radii, what does 'isoelectronic' mean?

• Having the same number of protons

• Having the same number of electrons

• Having the same atomic number

• Having the same atomic mass

Which ion has the largest ionic radius among the given species?

• Mg2+

• Na+

• F-

• O2-

How does the number of protons affect the ionic radius in isoelectronic species?

• Protons make the ionic radius fluctuate

• More protons increase the ionic radius

• More protons decrease the ionic radius

• Protons have no effect

Which of the following ions has the most protons?

• O2-

• Mg2+

• F-

• Na+

What is the relationship between electron repulsion and ionic radius in isoelectronic species?

• More repulsion leads to a smaller radius

• More repulsion leads to a larger radius

• Repulsion has no effect

• Repulsion causes the radius to fluctuate