Atomic Size and Effective Nuclear Charge

The video tutorial explains the concept of atomic radius and how it decreases from left to right across a period in the periodic table. It discusses the role of effective nuclear charge in this process and provides examples and calculations to illustrate the changes in atomic size. The tutorial concludes with a summary of the key points discussed.

What is the main topic discussed in the video?

• Atomic radius and its increase from left to right in the periodic table

• Atomic radius and its decrease from left to right in the periodic table

• Atomic mass and its increase from left to right in the periodic table

• Atomic mass and its decrease from left to right in the periodic table

What happens to the size of elements as you move from left to right in the periodic table?

• The size increases

• The size decreases

• The size remains the same

• The size fluctuates

Which element is mentioned as having the smallest atomic radius in the given example?

• Element C

• Element B

• Element A

• Element D

What is effective nuclear charge?

• The total charge of all electrons

• The net negative charge experienced by an electron in a multi-electron atom

• The net positive charge experienced by an electron in a multi-electron atom

• The total charge of the nucleus

How does effective nuclear charge change as you move from left to right in the periodic table?

• It increases

• It remains the same

• It fluctuates

• It decreases

What is the atomic number of nitrogen?

• 5

• 6

• 7

• 8

What is the atomic number of oxygen?

• 7

• 6

• 8

• 9

How does the atomic size of nitrogen compare to that of oxygen?

• They are the same size

• Oxygen is larger

• It depends on the temperature

• Nitrogen is larger

What happens to the atomic size as the number of protons increases?

• The atomic size increases

• The atomic size decreases

• The atomic size remains the same

• The atomic size fluctuates

What is the main reason for the decrease in atomic size from left to right in the periodic table?

• Increase in the number of neutrons

• Decrease in the number of electrons

• Increase in the number of protons

• Decrease in the number of protons