Question

What is the modern periodic table?

Answer 1

The arrangement of the elements in the periodic form is known as the periodic table. So, according to the atomic mass, the periodic table was formed and according to the atomic number again the periodic table was formed.

Complete answer:
The periodic table of Mendeleev was the first systematic approach to classifying elements based on their properties. However, it was limited to just sixty-three elements identified at the time and had some flaws. Since then, new elements have been discovered or synthesized in various ways. The total number of elements currently identified is 118. All of the elements do not fit on Mendeleev's table.
The fundamental particles of proton, electron, and neutron have been demonstrated experimentally to make up the atoms of elements. Every elemental atom, according to Rutherford, is made up of a fundamental positively charged particle called a "proton."
Spectral lines are related to the number of positively charged particles (Protons) present in the nucleus of the atom, according to Henry Moseley's atomic spectral analysis. Atoms are distinguished by the total number of protons in their nucleus. As a result, the number of protons, or "atomic number," was considered the fundamental nature of elemental atoms, rather than the atomic weight (as suggested by Mendeleev). Based on this atomic number, a new classification was developed, which became known as the modern periodic table.

Note:
In the modern periodic table, there are four blocks, i.e., s-block, p-block, d-block, and f-block. According to the last entering the subshell, they are divided into these blocks and this is decided by the electronic configuration.