11. What was Rutherford's contribution to the atomic model?A. Electrons are not bound to the nucleus. They can be separated from the atom byan electrical current.B. Most of the atom is empty volume. The nucleus only occupies a very tiny spacein the center of the atom.C. Protons have a positive charge. The protons are bound to the nucleus.D. Electrons have discrete amounts of energy. Electrons in different electron shellshave different amounts of energy.12. What was Nils Bohr's contribution to the atomic model?A. Electrons are not bound to the nucleus. They can be separated from the atom byan electrical current.B. Most of the atom is empty volume. The nucleus only occupies a very tiny spacein the cent of theC. Protons have a positive charge. The protons are bound to the nucleus.D. Electrons have discrete amounts of energy. Electrons in different electron shellshave different amounts of energy.13. What was Eugen Goldstein's contribution to the atomic model?A. Electrons are not bound to the nucleus. They can be separated from the atom byan electrical current.B. Most of the atom is empty volume. The nucleus only occupies a very tiny spacein the center of the atom.C. Protons have a positive charge. The protons are bound to the nucleus.D. Electrons have discrete amounts of energy. Electrons in different electron shellshave different amounts of energy.

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11. What was Rutherford's contribution to the atomic model? A. Electrons are not bound to the nucleus. They can be separated from the atom by an electrical current. B. Most of the atom is empty volume. The nucleus only occupies a very tiny space in the center of the atom. C. Protons have a positive charge. The protons are bound to the nucleus. D. Electrons have discrete amounts of energy. Electrons in different electron shells have different amounts of energy.

11. What was Rutherford's contribution to the atomic model? A. Electrons are not bound to the nucleus. They can be separated from the atom by an electrical current. B. Most of the atom is empty volume. The nucleus only occupies a very tiny space in the center of the atom. C. Protons have a positive charge. The protons are bound to the nucleus. D. Electrons have discrete amounts of energy. Electrons in different electron shells have different amounts of energy.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Which of the following is the most important factor in determining an element's place in the periodic table? A. Number of protons B. Number of neutrons C. Atomic Charge D. Atomic Density
QUESTION 7 Which one of the following statements is NOT true? a. Electrons behave like both particles and waves. b. The nucleus is involved in chemical reactions. c. Electrons are negatively charged. d. Electrons are found outside of the nucleus.
7. Write the letter of each sentence that is true about the nuclear theory of atoms suggested by Rutherford's experimental results. a. An atom is mostly empty space. b. All the positive charge of an atom is concentrated in a small central region called the nucleus. c. The nucleus is composed of protons. d. The nucleus is large compared with the atom as a whole. e. Nearly all the mass of an atom is in its nucleus.
Water contains small amounts of the element fluorine, which helps to strengthen tooth enamel and prevent cavities. What would you expect to happen to the fluorine element when it is added to drinking water? a. Fluorine would lose an electron and would be found as HF. b. Fluorine would gain a proton, becoming a radioactive isotope. c. Fluorine would gain an electron and would be found as F- or HF. d.Fluorine would form a covalent bond with water.
2. The most common isotope of carbon has a mass of 12. Carbon has an atomic number of 6.A. How many protons are in an atom of carbon? 17B. How many neutrons are in an atom of carbon?C. How many electrons are in an atom of carbon?D. Another isotope of carbon has a mass of 14. How many protons, neutrons, and electrons are in this isotope?
ymbor 3. Are the following statements regarding Dalton's atomic theory true or false? a. (True/False) All nitrogen atoms are identical. b. (True/False) Sodium and chlorine atoms combine in a 1:1 ratio to form sodium chloride (salt) Are the following statements regarding electrons true or false? a. (True/False) Electrons have a charge of 1+. b. (True/False) Electrons are found in the nucleus of the atom. 4. 5. Are the following statement regarding protons true or false? a. (TruelFalse) Protons have the same mass as electrons. b.True/False) Protons are positively charged. C. (True/False) Protons are found in the nucleus of the atom. What is the name and number of protons for each of the following atoms? Name 6. Number of Protons а. К b. Li С. Mn
A scanning electron microscope a.Uses glass lenses to focus the image of the sample b.Scans a proble along the surface of the sample c.Measures the electrons that pass through the sample d.Takes a complete picture of the sample all at once e.Measures the scattered electrons from the sample
Periodic Table 15. Write the letter of each statement that is true about the average atomic mass of an element and the relative abundance of its isotopes. a. In nature, most elements occur as a mixture of two or more isotopes. b. Isotopes of an element do not have a specific natural percent abundance. c. The average atomic mass of an element is usually closest to that of the isotope with the natural highest abundance. d. Because hydrogen has three isotopes with atomic masses of about 1 amu, 2 amu and 3 amu, respectively, the average atomic mass of natural is 2 amu.
Which of the following is not one of the four postulates of the atomic theory? Group of answer choices A. Atoms are divisible. B. Atoms of the same element have the same properties. C. Chemical compounds are composed of atoms of different elements D. Chemical reactions are merely rearrangements of the atoms
Which of the following statements is TRUE, and why? A. Anions are usually larger than their corresponding atoms. B. A neutral atom contains the same number of protons and neutrons. C. Protons and electrons contribute equally to the mass of the atom.
3. Write the letter of each sentence that is true about atoms, matter and electric charge. a. All atoms have an electric charge. b. Electric charges are carried by particles of matter. c. Electric charges always exist in whole-numbered multiples of a single basic unit. d. When a given number of positively charged particles combines with an equal number of negatively charged particles, an electrically neutral particle is formed.
Which statement regarding the nucleus of an atom is correct? O A. The nucleus contains protons and neutrons and has no charge. O B. The nucleus contains protons and electrons and has no charge. O C. The nucleus contains protons and electrons and is positively charged. O D. The nucleus contains protons and neutrons and is positively charged.