Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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Explain how and Dalton's atomic theory explains the fact that mass is conserved in chemical reaction
List and explain Dalton's atomic theory (postulates). Explain which postulates were rejected and state why
What is an element composed of?
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- How does an atom differ from a molecule? In what ways are they similar?arrow_forwardThe atomic weight of aluminum is 26.98u and the atomic weight of nickel is 58.69u. All aluminum atoms have a mass of 26.98u, but not a single atom of nickel has a mass of 58.69u. Explain.arrow_forwardScientists J. J. Thomson and William Thomson (Lord Kelvin) made numerous contributions to our understanding of the atom’s structure. Which subatomic particle did J. J. Thomson discover, and what did this lead him to postulate about the nature of the atom? William Thomson postulated what became known as the “plum pudding” model of the atom’s structure. What did this model suggest?arrow_forward
- A fundamental idea of Daltons atomic theory is that atoms of an element can be neither created nor destroyed. We now know that this is not always true. Specifically, it is not true for uranium and lead atoms as they appear in nature. Are the numbers of these atoms increasing or decreasing? Explain.arrow_forwardAn iron sphere has a radius of 3.4 cm. How many iron atoms are in the sphere? Iron has a density of 7.86g/cm3, and a sphere has a volume of V=(43)r3.arrow_forwardDescribe John Dalton's atomic theory?arrow_forward
- Compare the amount of copper predicted in part A with the amount measured in part B. What percentage of the predicted amount was obtained? Why aren’t these values the same?arrow_forwardDalton theorized that matter is made of tiny invisible particles called atoms. in what way did the theories of each of these scientists support or differ from Dalton's theory? (a) J.J. Thompson (b) Ernest Rutherford (c) James Chadwickarrow_forwardOutline Rutherford’s Gold foil experiment, including the observations and conclusions from his experiment.arrow_forward
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