Question : The atomic number of lead is:
Option 1: 81
Option 2: 78
Option 3: 82
Option 4: 79
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Correct Answer: 82
Solution : The correct option is 82 .
The atomic number of lead (Pb) is 82. It is a heavy metal known for its density and toxicity. It has various uses, including in batteries, construction, and radiation shielding, but its health risks have led to reduced use in these applications.
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Question : If $\cot B=9 $, then what will be the value of $\sec ^2 B$?
Question : Directions: Which of the following numbers will replace the question mark (?) in the given series? 67, 78, 71, 82, 75, 86, ?
Question : The average of three consecutive odd numbers is 52 more than $\frac{1}{3}$rd of the largest number. What is the smallest of these numbers?
Question : Direction: In the following question, select the related number from the given alternatives.
2/3 : 19/29 :: 8/7 : ?
Question : If $x+\frac{1}{x}=2 \sqrt{5}$ where $x>1$, then the value of $x^3-\frac{1}{x^3}$ is:
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