Coulombic Attraction and Periodic Trends

The video lecture covers periodic trends, focusing on the layout of the periodic table, columbic attraction, and effective nuclear charge. It explains how electron distance and shielding affect attraction forces, and how these concepts apply to trends across and down the periodic table.

Which of the following is NOT a family of elements on the periodic table?

• Alkali metals

• Inert metals

• Halogens

• Noble gases

What is the primary factor affecting Coulombic attraction?

• Electron configuration

• Atomic mass

• Distance of electrons from the nucleus

• Number of neutrons

How does the number of protons in the nucleus affect the attractive forces within an atom?

• It only affects the repulsive forces

• It increases the attractive forces

• It has no effect on the attractive forces

• It decreases the attractive forces

What happens to the distance of electrons from the nucleus as you move down a group in the periodic table?

• It decreases

• It remains constant

• It increases

• It fluctuates randomly

Which element has a greater effective nuclear charge, beryllium or calcium?

• It depends on the temperature

• They have the same effective nuclear charge

• Calcium

• Beryllium

What is the effect of electron shielding on the attractive force felt by outer electrons?

• It only affects inner electrons

• It has no effect

• It decreases the attractive force

• It increases the attractive force

As you move across a period from left to right, what happens to the effective nuclear charge?

• It fluctuates

• It increases

• It remains the same

• It decreases

Which of the following best describes the trend in atomic size as you move down a group?

• Atomic size fluctuates

• Atomic size increases

• Atomic size remains constant

• Atomic size decreases

What is the main reason for the increase in atomic size as you move down a group?

• Increase in electron affinity

• Decrease in electron shielding

• Addition of more energy levels

• Increase in nuclear charge

Which factor is primarily responsible for the increase in effective nuclear charge across a period?

• Increase in electron affinity

• Addition of more protons

• Increase in atomic mass

• Decrease in electron shielding