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read the following passage.

the word "atom" was coined by democritus, who, unlike aristotle, believed that matter can be divided only until we get the smallest "indivisible particle." several years later based on macroscopically observable experimental results, dalton proposed that all matter is composed of atoms. many postulates of atomic theory as proposed by dalton were later rejected by jj thompson, who has to his credit the discovery of sub atomic particles like electrons.

use information from the passage to justify whether the characteristics of reliable scientific explanations are present in the development of the atomic theory.

The development of the atomic theory meets the criteria of reliable scientific explanations because it was objective (repeatedly changed due to the discovery of new information), eventually verifiable, ethically neutral (scientists continually advanced the theory from an unbiased standpoint only to learn more about atoms), followed systematic exploration (found through the scientific method), was reliable (based on the research behind it), was predicted (scientists applied their knowledge of atoms to the real world), was abstract (scientific rather than fitting of current ideas), and was precise/accurate FOR THE TIME (Science is constantly shifting and improving, meaning that atomic researchers met the criteria the best they could at the time)

The development of the atomic theory meets the criteria of reliable scientific explanations because it was objective (repeatedly changed due to the discovery of new information), eventually verifiable, ethically neutral (scientists continually advanced the theory from an unbiased standpoint only to learn more about atoms), followed systematic exploration (found through the scientific method), was reliable (based on the research behind it), was predicted (scientists applied their knowledge of atoms to the real world), was abstract (scientific rather than fitting of current ideas), and was precise/accurate FOR THE TIME (Science is constantly shifting and improving, meaning that atomic researchers met the criteria the best they could at the time)

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.