Yes isotopes still exist. There are mainly two that exist on earth uranium-238, uranium-235. Does that answer your question.
HDT
All the isotopes from the decay chains exist in these rocks. The most important are the dangerous isotopes of radium and radon.
The element Q doesn't exist.
In the periodic table only the chemical elements appear; but tables for isotopes also exist.
Isotopes can exist because atoms of the same element can have different numbers of neutrons, leading to variations in atomic mass. This results in isotopes having the same number of protons but different numbers of neutrons, causing differences in stability and reactivity.
No most of them are not isotopes. Few elements exist as isotopes.
HDT
All the isotopes from the decay chains exist in these rocks. The most important are the dangerous isotopes of radium and radon.
The element Q doesn't exist.
In the periodic table only the chemical elements appear; but tables for isotopes also exist.
Isotopes can exist because atoms of the same element can have different numbers of neutrons, leading to variations in atomic mass. This results in isotopes having the same number of protons but different numbers of neutrons, causing differences in stability and reactivity.
Isotopes of elements exist. There are no isotopes for compounds and calcium chloride is a compound.
Two natural isotopes of bromine are known:- bromine-79: 50,69 %- bromine-81: 49,31 %
Isotopes have the same number of protons an electrons; the number of neutrons is different.
All the isotopes of a chemical element are identical; some differences exist for light elements (ex. H or D).
Isotopes have the same number of protons and electrons; the number of neutrons is different.
Some isotypes are more stable than others. Decay occurs because of instability in isotopes, so stable isotopes do not undergo radioactive decay.