Question : The atomic number of lead is:
Option 1: 81
Option 2: 78
Option 3: 82
Option 4: 79

Question

Question : If $\cot B = 9$ , then what will be the value of $\sec^{2} B$ ?
Option 1: $\frac{98}{81}$
Option 2: $\frac{92}{81}$
Option 3: $\frac{42}{81}$
Option 4: $\frac{82}{81}$

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Answer 1

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 : The atomic number of lead is:Option 1: 81Option 2: 78Option 3: 82Option 4: 79

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Question : The atomic number of lead is:
Option 1: 81
Option 2: 78
Option 3: 82
Option 4: 79