Explanation
Thallophytes are plants that have no stem, roots or leaves.
In the laboratory setup shown below, an upside-down beaker has been partially filled with the gaseous form of hydrogen \(\left(\mathrm{H}_{2}\right)\) , which is the lightest element. What is occurring in the illustration?
The Water Cycle
Given a sample of radium-226 having half-life of 4 days. Find, the probability, a nucleus disintegrates after 2 half lives: