For each of the following statements, circle T if the statement is true and circ
ID: 1646467 • Letter: F
Question
For each of the following statements, circle T if the statement is true and circle F if the statement is false. T F The energy in a light beam is contained in distinct packets, called photons. 2. T F The photoelectric effect is evidence of the wave nature of light. T F The fact that electrons can be diffracted indicates that electrons are particles. T F Scientists cannot make predictions about the behavior of particles at the quantum level. T F Nucleons are bound together by an electrical force. T F A beta particle is an electron. T F The atomic number of an atom refers to the number of nucleons in its nucleus. T F The longer the half-life of a substance, the more quickly the substance will decay into other elements. T F Transuranic elements have half-lives that are much shorter than the age of the earth. T F In uranium enrichment, U-235 and U-238 are separated by a chemical reaction. T F Fusion reactions occur when lighter nuclei fuse together and release energy. Answer the following questions by writing on the blank lines the letter(s) of the word or phrase that best complete(s) the statement or answers the question. __________The energy of a photon is (A) equal to that of every other photon (B) directly proportional to the wavelength of the photon (C) directly proportional to the frequency of the photon (D) directly proportional to the mass of the photon.Explanation / Answer
(1) - T : Individual packet of energy is called photon.
(2) - F: Photoelectric effect is the evidence of particle nature of light.
(3) - T: Electron diffraction proves the particle nature of electron.
(4) - T: At quantum level particle behaves very strangly.
(5) - F: This force is called nuclear force.
(6) - T: It is a high speed electron.
(7) - T: No. of nucleons (protons + nutrons) is equal to the atomic number.
(8) - F: Longer half-life will take more time to decay.
(9) - T: The statement is true.
(10) - T
(11) - T
(12) - C,
Energy of a photon is directly proportional to its frequency and inversely prportional to its wavelength.
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