18 A selenium atom has a 2- charge. Which best describes the selenium atom? A. 34 protons, 32 electrons B. 34 protons, 36 electrons C. 32 protons, 34 electrons D. 79 protons, 34 electrons 19. A manganese atom has a 5+ charge. Which best describes the manganese atom A. 20 protons, 25 electrons B. 25 protons, 20 electrons C. 55 protons, 30 electrons D. 30 protons, 25 electrons 20. Which is accurate about the atom? A. Mass of proton = mass of electron B. Mass of neutron = mass of electrons C. Mass of proton = mass of neutron D. Mass of proton = mass of electron = mass of electron

18 A selenium atom has a 2- charge. Which best describes the selenium atom? A. 34 protons, 32 electrons B. 34 protons, 36 electrons C. 32 protons, 34 electrons D. 79 protons, 34 electrons 19. A manganese atom has a 5+ charge. Which best describes the manganese atom A. 20 protons, 25 electrons B. 25 protons, 20 electrons C. 55 protons, 30 electrons D. 30 protons, 25 electrons 20. Which is accurate about the atom? A. Mass of proton = mass of electron B. Mass of neutron = mass of electrons C. Mass of proton = mass of neutron D. Mass of proton = mass of electron = mass of electron

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter4: Chemical Foundations: Elements, Atoms, And Ions

Section: Chapter Questions

Problem 21QAP: Scientists J. J. Thomson and William Thomson (Lord Kelvin) made numerous contributions to our...

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Similar questions

Do the proton and the neutron have exactly the same mass? How do the masses of the proton and the neutron compare to the mass of the electron? Which particles make the greatest contribution W the mass of an atom? Which particles make the greatest contribution to the chemical properties of an atom?
Your friend tells you about an article that he read in a tabloid that reported the discovery of a new form of carbon containing eight protons in the nucleus of its atoms. He claims that scientists are eager to explore the properties of this new form of carbon. What is wrong with the tabloid's claim? a. Nothing. The claim is believable. b. The claim must be false because an atom with eight protons would be oxygen, which is already known. c. The claim must be false because all forms of carbon are already known.
An element consists of 1.40% of an isotope with mass 203.973 u, 24.10% of an isotope with mass 205.9745 u, 22.10% of an isotope with mass 206.9759 u, and 52.40% of an isotope with mass 207.Y766 u. Calculate the average atomic mass, and identify the element.
One of the best indications of a useful theory is that it raises more questions for further experimentation than it originally answered. Does this apply to Daltons atomic theory? Give examples.
Without consulting your textbook or notes, state as many points as you can of Dalton’s atomic theory. Explain in your own words each point of the theory.
Why is it important to understand atoms?
Atoms are electrically neutral. This means that an atom will contain a.more protons than neutrons. b.more electrons than protons. c.an equal number of protons and electrons. d.None of the above.
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lton believed that atoms were indivisible. Thomson and Rutherford helped to show that this was not true. What if atoms were indivisible? How would this affect the types of reactions you have learned about in this chapter?