Answer:
A. The elements that have been discovered so far can be found here.
B. It is arranged by the atomic number (number of protons).
Explanation:
About the Answers:
All the elements that have been discovered are on the periodic table. Scientist know that there are still unknown elements and actually predict what they'll be like and what their properties are. The periodic table is arranged by the increasing number of atomic numbers. The atomic number is main identification of elements and is the amount of protons each element has.
About the Wrong Answers:
All the compounds that can be created are not found on the periodic table. In fact, there more than nine million organic compounds. The periodic table is not arranged by all of the subatomic particles. While the atomic mass and electron configuration is included, it is not arranged by it.
