Introductory Chemistry For Today
8th Edition
ISBN: 9781285644561
Author: Seager
Publisher: Cengage
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- Copper (Cu) has an atomic number of 29 and a mass number of 64. One copper atom, therefore, has how many protons? a.27 b.29 c.31 d.35arrow_forwardWhat particles are found in the nucleus of an atom? What is the charge of the nucleus?arrow_forwardThe isotope Si-28 has a mass of 27.977 amu. For ten grams of Si-28, calculate (a) the number of atoms. (b) the total number of protons, neutrons, and electrons.arrow_forward
- Complete the following table. Atmos Number of Protons Number of Neutrons H24e N1020e T2248i O76190s C2750oarrow_forwardAn atom that has lost three electrons will have a charge of .arrow_forwardThe number of protons in an atom determines the identity of the atom. What do the number and arrangement of the electrons in an atom determine? What does the number of neutrons in an atom determine?arrow_forward
- The isotope of plutonium used for nuclear fission is 239Pu . Determine (a) the ratio of the number of neutrons in a 239Pu nucleus to the number of protons, and (b) the number of electrons in a single plutonium atom.arrow_forwardNaturally occurring sodium has a single isotope. Determine the following for the naturally occurring atoms of sodium: a. The number of neutrons in the nucleus. b. The mass in u of the nucleus to three significant figures.arrow_forwardThe existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?arrow_forward
- Mercury An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this isotope?arrow_forwardThe Rutherford experiment was performed and its conclusions reached before protons and neutrons were discovered. When they were found, why was it believed that they were in the nucleus of the atom?arrow_forwardHow many platinum atoms are in a pure platinum ring weighing 4.32 g?arrow_forward
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