Valence Electrons and Electron Configuration

The video tutorial explains two methods to determine the number of valence electrons in francium. The first method involves using the periodic table, where francium is in group one, indicating it has one valence electron. The second method uses electron configuration, showing that the highest energy level for francium has one valence electron. Both methods confirm that francium has one valence electron.

What is one method to determine the number of valence electrons in francium?

• Referring to the periodic table

• Measuring the atomic radius

• Counting the protons

• Using the atomic mass

Which group on the periodic table does francium belong to?

• Group 2

• Group 1

• Group 18

• Group 8

How many valence electrons do noble gases typically have?

• Six

• One

• Eight

• Two

What is the highest energy level in francium's electron configuration?

• Fifth energy level

• Sixth energy level

• Eighth energy level

• Seventh energy level

In electron configuration, what does the outer shell represent?

• The atomic mass

• The number of protons

• The total number of electrons

• The valence electrons

How many valence electrons does francium have?

• Three

• Four

• One

• Two

What is the significance of the group number in determining valence electrons?

• It shows the number of valence electrons

• It indicates the atomic mass

• It represents the number of protons

• It determines the atomic radius