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An element which is not found in nature ...

An element which is not found in nature is

A

Pt

B

K

C

Zn

D

Pm

Text Solution

AI Generated Solution

The correct Answer is:
To determine which element is not found in nature from the given options, we will analyze each option step by step. ### Step 1: Analyze Option A - Platinum (Pt) - **Platinum (Pt)** is a rare element, but it is found in nature, specifically in nickel and copper ores. Therefore, it is not the correct answer. ### Step 2: Analyze Option B - Potassium (K) - **Potassium (K)** is an element that is commonly found in seawater and various minerals. Thus, it is also not the correct answer. ### Step 3: Analyze Option C - Zinc (Zn) - **Zinc (Zn)** is an abundant element that is found in significant amounts in the Earth's crust. Hence, it is not the correct answer. ### Step 4: Analyze Option D - Promethium (Pm) - **Promethium (Pm)** is a radioactive element. It is not found in the Earth's crust naturally. However, it can be produced as a result of uranium decay. Therefore, it is the element that is not found in nature. ### Conclusion The element which is not found in nature is **Promethium (Pm)**.
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