Which element has the largest atomic number?

• A. Uranium (U)
• B. Oganesson (Og)
• C. Lead (Pb)
• D. Gold (Au)

Answer: (B)

Verified step by step guidance

1. Understand that the atomic number of an element is the number of protons in its nucleus, which uniquely identifies the element.
2. Recall or look up the atomic numbers of the given elements: Uranium (U), Lead (Pb), Gold (Au), and Oganesson (Og).
3. Compare the atomic numbers of these elements to determine which one is the largest.
4. Note that Uranium has an atomic number of 92, Lead is 82, Gold is 79, and Oganesson is 118.
5. Conclude that the element with the largest atomic number among the options is the one with the highest value, which is Oganesson (Og) with atomic number 118.