Question

Explain how you know that no new element with an atomic number less than 100 will be discovered.

A. The periodic table is already complete.
B. Scientists have reached the limit of their knowledge.
C. All natural elements below atomic number 100 are radioactive.
D. The periodic table is based on solid scientific evidence.

Answer 1

The periodic table is based on solid scientific evidence, and scientists continue to research and update it as new elements are discovered. Elements with atomic numbers higher than 92 are highly unstable, but there may be an 'island of stability' beyond element 118 where more stable elements could exist.

Step-by-step explanation:

The correct answer to the question is D. The periodic table is based on solid scientific evidence.

The periodic table is an organized chart that lists the known elements based on their atomic number. It is a result of extensive research and experimentation in the field of chemistry. Scientists have conducted numerous experiments to discover and study elements, and the periodic table continues to be updated as new elements are discovered.

Currently, there are 118 known elements on the periodic table. Elements past atomic number 92 are highly unstable and have short lifetimes. Scientists believe that after element 118, there might be an 'island of stability' where elements with higher atomic numbers could exist. However, these elements have not been discovered yet.