Question : Which of the following elements does not belong to group 1 of the modern periodic table?
Option 1: Sodium
Option 2: Radium
Option 3: Potassium
Option 4: Lithium
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Correct Answer: Radium
Solution : The correct answer is Radium .
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Question : Which element precedes carbon in the modern periodic table?
Question : What is the chemical name of table salt?
Question : Which chemical element from group 18 of the modern periodic table, whose atomic number is 10, contains a mixture of three stable isotopes commonly used to make signal and gas lasers and as refrigerators?
Question : Name the metal ion used in the Veri-Green process.
Question : Which of the following elements is the densest naturally occurring element?
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