Choose the correct alternative and rewrite statement.
Chapter No. 2: Periodic Classification of Elements.
Which of the following noble gas is used to fill balloons and airships?
A. Helium
B. Neon
C. Argon
D. Radon
Which of the following noble is used in radiotherapy for cancer treatment?
A. Helium
B. Neon
C. Argon
D. Radon
Answers:
Chapter No. 2: Periodic Classification of Elements.
Which of the following noble gas is used to fill balloons and airships?
A. Helium
B. Neon
C. Argon
D. Radon
Which of the following noble is used in radiotherapy for cancer treatment?
A. Helium
B. Neon
C. Argon
D. Radon
