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?
Option 1: Neon
Option 2: Oganesson
Option 3: Helium
Option 4: Radon
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Correct Answer: Neon
Solution : The correct answer is Neon.
Neon lies on the right side of the modern periodic table. It is a Noble gas from Group 18. Ne is the element symbol for Neon. Its atomic number is 10. Thus, there are ten protons and ten electrons in each atom of Neon. Neon has a mass number of 20 amu. Thus, there are ten neutrons in each neon atom.
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Question : Which element precedes carbon in the modern periodic table?
Option 1: Boron
Option 2: Lithium
Option 3: Beryllium
Option 4: Magnesium
Question : Which of the following is not a noble gas?
Option 1: Radon
Option 2: Argon
Option 3: Carbon
Option 4: Neon
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
Question : The naturally occurring gas that is generated by the breakdown of organic matter by anaerobic bacteria and is used in energy production is called:
Option 1: Compressed Natural Gas
Option 2: Biogas
Option 3: Natural gas
Option 4: Liquified Petroleum Gas
Question : Which of the following gases is used in the manufacture of soft drinks?
Option 1: Oxygen
Option 2: Carbon dioxide
Option 3: Carbon monoxide
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