Physics Quiz
Structure of Matter | | 1. | An element consists of three isotopes in the relative abundance given below. What is the atomic mass of this element? | | 30.00% = 40.00 amu50.00% = 41.00 amu20.00% = 42.00 amu | | (A) | 40.90 | | (B) | 41.00 | | (C) | 41.90 | | (D) | 42.20 | | (E) | 42.90 | | | 2. | The total number of electrons that can be accommodated in the fourth principal energy level is _____ | | (A) | 2 | | (B) | 8 | | (C) | 18 | | (D) | 32 | | (E) | 50 | | | 3. | If the set of quantum numbers n = 3, l = 1, ml = 0, ms = ±1/2 represents the last electron to be added to complete the ground state electron configuration of an element, which one of the following could be the symbol for the element? | | (A) | Na | | (B)
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| A system is at equilibrium when the rate of the forward reaction is equal to the rate of the reverse reactions. | BECAUSE | At equilibrium, the concentration of the products is equal to that of the reactants. |
| | 5. | Which of the following statements best describes the condition(s) needed for a successful formation of a product in a chemical reaction? | | (A) | The collision must involve a sufficient amount of energy, provided from the motion of the particles, to overcome the activation energy. | | (B) | The relative orientation of the particles has little or no effect on the formation of the product. | | (C) | The relative orientation of the particles has an effect only if the kinetic energy of the particles is below some minimum value. | | (D) | The relative orientation of the particles must allow for formation of the new bonds in the product. | | (E) | The energy of the incoming particles must be above a certain minimum value and the relative orientation of the particles must allow for formation of new bonds in the product. | | | 6. | The catalyzed pathway in a reaction mechanism has a _____ activation energy and thus causes a _____ reaction rate.
| A system is at equilibrium when the rate of the forward reaction is equal to the rate of the reverse reactions. | BECAUSE | At equilibrium, the concentration of the products is equal to that of the reactants. |
| | 5. | Which of the following statements best describes the condition(s) needed for a successful formation of a product in a chemical reaction? | | (A) | The collision must involve a sufficient amount of energy, provided from the motion of the particles, to overcome the activation energy. | | (B) | The relative orientation of the particles has little or no effect on the formation of the product. | | (C) | The relative orientation of the particles has an effect only if the kinetic energy of the particles is below some minimum value. | | (D) | The relative orientation of the particles must allow for formation of the new bonds in the product. | | (E) | The energy of the incoming particles must be above a certain minimum value and the relative orientation of the particles must allow for formation of new bonds in the product. | | | 6. | The catalyzed pathway in a reaction mechanism has a _____ activation energy and thus causes a _____ reaction rate.