Name of the heaviest naturally occurring element.

Explanation

To find the heaviest naturally occurring element, we can follow these steps:

### Step 1: Understand the Concept of Naturally Occurring Elements
Naturally occurring elements are those that can be found in nature without human intervention. They are formed through natural processes, such as stellar nucleosynthesis.

**Hint:** Remember that not all heavy elements are naturally occurring; some are synthesized in laboratories.

### Step 2: Identify Heavy Elements
Among the elements in the periodic table, we need to focus on those that are classified as heavy elements. Heavy elements typically have high atomic numbers.

**Hint:** Look for elements with high atomic numbers, particularly those in the actinide series.

### Step 3: Locate Uranium
Uranium (U) is known to be one of the heaviest naturally occurring elements. It has an atomic number (Z) of 92 and an average atomic mass of approximately 238 u.

**Hint:** Check the periodic table for the actinide series to find uranium.

### Step 4: Consider Elements Beyond Uranium
After uranium, there are elements like neptunium (Np, atomic number 93) and plutonium (Pu, atomic number 94). However, these elements are not naturally occurring; they are man-made.

**Hint:** Distinguish between naturally occurring elements and those that are artificially created.

### Step 5: Conclusion
Based on the information gathered, we conclude that the heaviest naturally occurring element is uranium (U).

**Final Answer:** The heaviest naturally occurring element is uranium (U).

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