Question

OR
12c and 4c are two elements. Do both these elements get different
positions in modern periodic table? Explain your answer. Identify the
period and group to which they belong in the modern periodic table with
suitable reason.
A​

Answer 1

No as they are isotopes of carbon but the peridic table is based on atomic number which is based on the protons.

the isotopes have same atomic no but different mass no so they are placed at same place