Periodic Trends in Chemistry

The video tutorial explains how to use graphs to determine periodic trends in the periodic table. It covers trends across groups and periods, focusing on atomic radius, ionization energy, and electronegativity. The tutorial emphasizes understanding graph axes and interpreting data to identify trends, encouraging practice for mastery.

What is a periodic trend?

• A pattern that is random and unpredictable.

• A trend that is only observed in non-metals.

• A trend that occurs only in metals.

• A pattern observed in the properties of elements across a period or group.

How does atomic radius change as you move down a group?

• It fluctuates randomly.

• It increases.

• It remains constant.

• It decreases.

Which of the following elements has the largest atomic radius in its group?

• Potassium

• Sodium

• Lithium

• Cesium

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

• It increases.

• It decreases.

• It remains the same.

• It increases then decreases.

Which element has a smaller atomic radius, lithium or fluorine?

• Lithium

• It depends on the temperature.

• Fluorine

• They have the same atomic radius.

How does ionization energy change as you move up a group?

• It decreases.

• It fluctuates.

• It increases.

• It remains constant.

Which direction on the periodic table indicates an increase in ionization energy?

• Downward and to the left

• Upward and to the right

• Downward and to the right

• Upward and to the left

What is the trend for electronegativity as you move across a period?

• It remains the same.

• It increases.

• It decreases.

• It decreases then increases.

Which element is more electronegative, fluorine or iodine?

• It depends on the compound they are in.

• Iodine

• Fluorine

• They have the same electronegativity.

In which direction does electronegativity increase on the periodic table?

• Upward and to the right

• Downward and to the left

• Upward and to the left

• Downward and to the right