Which element name is given to atomic number 104 (IUPAC)?

📚 Chapter: Classification of Elements and Periodicity in Properties

📘 Solution

🔵 Step 1: Identify Atomic Number

The element having atomic number 104 is a member of the transactinide series.

Atomic Number (Z) = 104

🟢 Step 2: IUPAC Name

The official IUPAC name assigned to element 104 is:

Rutherfordium

Symbol: Rf

It was named in honour of the famous physicist Ernest Rutherford.

🎬 3D-Style Atomic Number Animation

1 0 4

↓

104 → Rutherfordium → Rf

🟣 Step 3: Important Facts

• Atomic Number: 104
• Name: Rutherfordium
• Symbol: Rf
• Block: d-block
• Period: 7
• Group: 4

📝 MCQ Practice

Q1. What is the IUPAC name of the element with atomic number 104?

A) Dubnium

B) Rutherfordium

C) Seaborgium

D) Bohrium

✅ Show Answer

Answer: B) Rutherfordium

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Q2. What is the symbol of Rutherfordium?

A) Ru

B) Rf

C) Rd

D) Rt

✅ Show Answer

Answer: B) Rf

✅ Final Answer

Atomic Number 104 = Rutherfordium (Rf)

🎯 Exam Point

104 → Rutherfordium → Rf

Period 7 → Group 4 → d-block