The Fascinating World of Helium

Helium, a noble gas with the symbol He and atomic number 2, is located at the topmost right of the periodic table. It is known for its stability due to its two valence electrons. Helium was first observed in the sun's spectrum and later isolated on Earth by Sir William Ramsay. Despite its limited valence electrons, helium shares properties with other noble gases, being inert and non-reactive. It is widely used in cryogenics, medical equipment, and as a lifting gas for balloons. Helium is also used in leak detection and arc welding. However, inhaling helium can be dangerous as it displaces oxygen, posing a risk of suffocation.

What makes helium the most stable noble gas?

• It is highly reactive.

• It has a large atomic radius.

• It has eight valence electrons.

• Its two electrons are closely held.

Which of the following is a primary use of helium in medical technology?

• Sterilizing equipment

• Cooling MRI scanners

• Inflating surgical gloves

• Enhancing X-ray images

Why is helium preferred over hydrogen for inflating balloons?

• Helium is non-flammable and safer.

• Helium provides more lift than hydrogen.

• Helium is lighter than hydrogen.

• Helium is cheaper than hydrogen.

In what way is helium used in the electronics industry?

• For growing silicon crystals

• As a conductor in circuits

• To power electronic devices

• As a coolant for processors

What is a potential risk of inhaling too much helium?

• It can cause dehydration.

• It can increase blood pressure.

• It can lead to suffocation.

• It can cause chemical burns.