Which of the following is the first noble gas?AXenonBHeliumCKryptonDRadon

The noble gases include helium, neon, argon, krypton, radon and xenon. Identify the time period when most of the noble gases were discovered.

Which one of the following Noble Gases is not present in the air?*1 pointRadonArgonHeliumNeon

Specify why the noble gases were among the last naturally occurring elements to be discovered.

Describe the feature of noble gases that makes them highly unreactive.

What group of the periodic table are the noble gases found in?Group 2Group 0Group 1Group 72Which of the following is not a property of the noble gases?They are colourlessThey have high boiling pointsThey exist as single atomsThey do not form molecules3Which is the best explanation for why the noble gases are unreactive?They all have low boiling pointsThey are all gasesThey all have full outer electron shellsThey are all large atoms4Which noble gas has the following electronic structure: 2, 8, 8?HeliumKryptonNeonArgon5The boiling point of helium is -269°C, while that of argon is -185.8° Predict the boiling point of neon:-275°C-246°C-269°C-176°C