The P Block Elements

The given question asks which synthetically produced radioactive noble gas is formed by the collision of with . Let's analyze the process and find the correct answer.

Understanding the Process:

The collision of californium ( ) with calcium ( ) nuclei is a nuclear reaction used to synthesize superheavy elements. In these reactions, two nuclei combine to form a heavier nucleus.

Synthesis of Oganesson:

Oganesson (Og) is one of the superheavy elements that belong to the noble gas group. It was first synthesized in 2002, with the atomic number 118 and symbol Og.

The reaction can be represented as follows:

Thus, during the reaction, three neutrons are released, and Oganesson is produced.

Justifying the Correct Option:

• Radon: Radon is a naturally occurring radioactive noble gas, not produced synthetically through such reactions.
• Radium: Radium is an alkaline earth metal, not a noble gas.
• Oganesson: As analyzed, it is the result of synthesizing from this reaction, and it is a noble gas.
• Xenon: Xenon is another noble gas, but it is not produced in this reaction.

Therefore, the synthetically produced radioactive noble gas is Oganesson.

Conclusion:

By understanding the nuclear reaction between and , we conclude that the correct answer is Oganesson. This matches with option 3.

The question asks about the characteristics of gas. To determine the correct answer, we need to consider both the color and the acidity of gas.

1. Color: gas is known to be a reddish-brown gas. It is commonly observed in the atmosphere as a brown haze, especially in urban areas with high levels of pollution. Thus, the characterisation of gas as colorless is incorrect.
2. Acidity and Chemistry: is a nitrogen dioxide molecule, which is an acidic oxide of nitrogen. When it is dissolved in water, it leads to the formation of a mixture of nitric acid ( ) and nitrous acid ( ), making the solution acidic:

1. Considering the above properties, is acidic in nature.

Given the information, the correct characteristics of gas are:

Brown, acidic

This matches the option: Brown, acidic.