EASY
Diploma
IMPORTANT
Earn 100

The thinning of the ozone layer increases the amount of UV-B radiation that reaches the earth's surface.

Types of radiation Wavelength/nm
UV-A 320-380
UV-B 290-320

Based on the information in table, explain why UV-B rays are more dangerous than UV-A.

Important Questions on Atomic Structure

EASY
Diploma
IMPORTANT
Deduce the full electronic configuration for Mn and Mn2+.
EASY
Diploma
IMPORTANT
Deduce the condensed electron configuration for Cu2+.
EASY
Diploma
IMPORTANT
Draw orbital diagrams for Co2+ and As.
EASY
Diploma
IMPORTANT
Atoms are often drawn as spheres. Comment on the use of this representation as a model.
EASY
Diploma
IMPORTANT
Developments in scientific research follow improvements in apparatus. Discuss this statement with regard to the use of electricity and magnetism in Thomson's experiments with cathode rays.
EASY
Diploma
IMPORTANT
In many textbooks the electronic configuration for vanadium is written as Ar4s23d3. This is common practice and widely accepted by the chemical community. However, suggest why this way of writing the electronic configuration for vanadium may be at odds with experimental evidence.