Group 0: the noble gasesIB MYP Chemistry: Flashcards

What these 12 flashcards ask

Name the elements in Group 0 in order.
What is special about the outer shell of a noble gas?
How many outer electrons does helium have?
How many outer electrons do neon and argon have?
Why are the noble gases unreactive?
What does monatomic mean?
What is the trend in boiling point down Group 0?
Which noble gas has the lowest boiling point?
Why is helium used in balloons?
Why is helium safer than hydrogen in balloons?
What is neon used for?
Give two uses of argon.

Exam questions on Group 0: the noble gases

A party shop in Dubai fills foil balloons with helium. The balloons float upwards when released, and the shop owner has been told that helium is much safer to use than hydrogen.
Explain why helium is safer than hydrogen for filling balloons.2 marks
A welder in a workshop in Seoul joins two stainless steel plates using a very hot electric arc. A steady stream of argon gas is blown over the hot metal while the welding is done.
Explain why argon is used instead of air during welding.2 marks
The boiling points of the first five noble gases are: helium −269 °C, neon −246 °C, argon −186 °C, krypton −153 °C and xenon −108 °C. A student is asked to predict the properties of radon, the next noble gas below xenon. Room temperature is 20 °C.
Describe the trend in boiling point down the group.3 marks

Written by the Exaim team, led by Shaun Daswani (Head of Upper Secondary, Improve ME Institute; MSc Financial Mathematics, Imperial College London; BSc, UCL) and Jason Daswani (operational lead, Improve ME Institute; LSE).