Final answer:
The question involves the chemistry concept of isotopes, specifically the fictional element Nivadium with its natural isotopes and their respective abundances, paralleling real elements like carbon and lithium.
Step-by-step explanation:
The question pertains to the concept of isotopes and their natural abundance in chemistry. An isotope refers to atoms of the same element that have the same number of protons and electrons but different numbers of neutrons, leading to different atomic masses. The term 'natural abundance' refers to the proportion of each isotope present in a naturally occurring mixture of isotopes for an element.
For example, the natural isotopes of carbon are known as carbon-12 (C-12), carbon-13 (C-13), and carbon-14 (C-14). In the context of the provided information, Nivadium would be a fictional element that has several isotopes, similar to how lithium naturally occurs with its isotopes having either three or four neutrons, proportionately distributed with 93% and 7% natural abundance, respectively.
Understanding isotopes and their abundances is vital, as it refines our knowledge from Dalton's Atomic Theory. We realize that isotopes contribute to the variable atomic masses of elements and can exhibit properties such as radioactivity if they are unstable. This knowledge is critical in fields like nuclear chemistry and environmental studies, where isotope ratios can reveal insights into processes from cosmic history to present-day biochemical cycles.