Iron and Its Electron Configuration

The video tutorial explains how to determine the number of valence electrons for iron (Fe) by examining its position in the periodic table and its electron configuration. It discusses the concept of valence electrons in main group elements and the challenges posed by transition metals. The tutorial provides a detailed look at the electron configuration of iron, including its condensed notation using the noble gas core of argon. It further explores how iron uses its valence electrons to form chemical bonds, specifically forming Fe2+ and Fe3+ ions by losing electrons. The video concludes with a recap of the key points discussed.

What is the number of valence electrons for elements in Group 1 of the periodic table?

• Four

• Three

• One

• Two

Which block of the periodic table does iron belong to?

• S Block

• P Block

• D Block

• F Block

How many protons does iron have?

• 27

• 24

• 25

• 26

What is the noble gas used in the condensed electron configuration of iron?

• Neon

• Argon

• Krypton

• Xenon

How many valence electrons does iron have in its neutral state?

• Six

• Seven

• Nine

• Eight

What is the charge of the iron ion when it loses two valence electrons?

• 1+

• 2+

• 3+

• 4+

In the Fe2+ ion, which orbital loses the electrons?

• 3d

• 4s

• 5p

• 6d

How many electrons are lost from the d orbital in the formation of Fe3+?

• Four

• One

• Two

• Three

What is the electron configuration of Fe3+?

• 4s0 3d6

• 4s2 3d4

• 4s0 3d5

• 4s1 3d5

Which of the following ions is formed when iron loses three electrons?

• Fe+

• Fe2+

• Fe3+

• Fe4+