No most of them are not isotopes. Few elements exist as isotopes.
In the periodic table only the chemical elements appear; but tables for isotopes also exist.
The lightest element on the periodic table with no stable isotopes is hydrogen. It only has one proton in its nucleus and no stable isotopes.
The periodic table give the atomic numbers and the atomic weights of chemical elements.
The periodic table would be disturbed only if isotopes of a new element are discovered, because a periodic table is based on order of atomic number, not atomic mass. If new isotopes of a previously known element were discovered, the atomic mass shown in the periodic table might be changed, but this is very unlikely because the atomic masses shown in a periodic table are based on the naturally occurring distribution of isotopes, and any newly discovered isotopes would probably occur only in very small fractions of the total.
Isotopes are not found on different sections of the periodic table because isotopes have the same number of protons and electrons as the element they correspond to, so they are placed in the same position on the table based on their atomic number. The different isotopes of an element have a different number of neutrons, which affects their atomic mass but not their position on the periodic table.
You think probable to isotopes; but the most important isotope of artificial radioactive elements is included in the periodic table.
look at a periodic table :)
Elements have different isotopes and each isotope will have different atomic mass. As such it is not possible to list the mass number of all the isotopes on the periodic table. However, the atomic mass is generally given on the periodic table which is generally calculated taking into account all the isotopes and its percentage.
Isotopes of the same element with different atomic masses are placed in the same position on the periodic table because they have the same number of protons and electrons. The atomic number, which determines an element's position on the periodic table, is the same for all isotopes of an element.
Isotopes are not specifically located in the modern periodic table because they have the same number of protons (same element) but different numbers of neutrons. However, isotopes of an element share similar chemical properties due to their identical electronic configurations.
Isotopes and their prevalence are not shown on the periodic table. Instead, the atomic weight shown for each element is an average of the atomic weights of all naturally-occurring isotopes (calculated from percentages occurring on Earth).
Isotopes with a high atomic number and/or an unstable ratio of protons to neutrons are more likely to decay. Generally, isotopes further from the line of stability on the periodic table are more likely to undergo radioactive decay.