The theory of atomic structure has changed significantly over time. What should happen if a trusted scientific experiment yields results that contradict part of this theory?

Md Ariful Islam

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Md Ariful Islam

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In most treatments of scientific theory, a theory is never regarded as $"proven"$. Proof is an unreasonable and impossible requirement. Theories, large scale generalizations that predict and explain phenomena, are known to be consistent with all existing data and experiment.

Should a set of experimental results occur that falsified the theory, then the theory would be modified to accommodate the confounding data. If enough falsifying data emerge, then the theory would be abandoned.

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Is a theory that has stood the test of time and has been verified by experiment after experiment may eventually be referred to as a hypothesis?

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What is the part of the experiment that is changed on purpose?

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Why has atomic structure changed?

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The idea with that have two naturally occurring is that the percent abundances of those two must add up to give $100%$. In calculations, it is often easier to...

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Multiply the atomic mass of each isotope times its percent abundance in decimal form. Add them together. $"Average atomic mass of Br"$$=$$(78.92xx0.5069)+(80.92xx0.49331)="79.92 u"$

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An average sample of chlorine contains 75.77% chlorine-35, with an atomic mass of 34.969 amu (atomic mass units), and 24.23% chlorine-37, with an atomic mass of 36.966 amu. What is the average atomic mass of chlorine?

The weighted average is the sum of each individual nuclide, multiplied by its isotopic abundance. So, we simply do the arithmetic: $0.7577xx34.969+0.2423xx36.966 = ???$ amu Then look at to...

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