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To examine: The
Introduction: An atom consists of electrons (e), protons (p) and neutrons (n). Different atoms have specific numbers of electrons, protons and neutrons. The electron and proton are negatively and positively charged respectively. Neutron has no charge. Nucleus of an atom contains protons and neutrons that constitute the mass of an atom. Electrons revolve around the nucleus in their orbit. The atomic number of an element is the number of protons in the nucleus of its atoms. In a neutral atom, the number of protons and electrons is equal. Thus, the number of electrons present in a neutral atom is equal to its atomic number. An isotope of an atom differs from neutron numbers and therefore by mass.
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Chapter 2 Solutions
Campbell Biology (11th Edition)
- Use your copy of the periodic table to answer this question: If you add an electron to fluorine, what will result? A) a negatively charged anion B) a different atomic number C) a different isotope D) a different element E) a positively charged cationarrow_forwardThe atomic mass of an element can be used to determine A) the chemical properties of the element B) the number of protons in the element C) the number of neutrons in the element D) the number of protons plus neutrons in the element E) both the number of protons and the chemical properties of the elementarrow_forwardD) Isotopes of molybdenum have different numbers of electrons. moib 3 18) Carbon-14 has the same A) atomic number and atomic mass as carbon-12 B) atomic number and thus number of neutrons as carbon-13 C) atomic mass as both carbon-12 and carbon-13 D) number of protons but more neutrons than carbon-12 1m gaivil lo 2insmolo insbnuds kom oni si muiaio bon yvxo.obl.cod1oA 19) A(n). charge. A) proton; neutron B) neutron; proton C) neutron; electron D) electron; neutron has charge but negligible mass, whereas a(n) sm has mass but no .boolsse omuanou ion bluode olog mon gunsue ositegA(C Sabauoqm n gaiwollol si lo loidW ( O Lin OcH ( 20) The atomic number of nitrogen is 7. Nitrogen-15 has a greater mass number than nitrogen-14 because the atomic nucleus of nitrogen-15 contains on Jud A) 7 neutrons B) 8 neutrons C) 8 protons D) 15 protons isloun tisi ni anortuon bogudor tA attoTuon brus 2ol0g lo 19dnuun isupo ns (8 eao1o9ls bas enolong to 1odamun hanps n 21) Which of the following is not a…arrow_forward
- . Give the name of and symbol for an element with this number of valence electrons.a) 2b) 6c) 8arrow_forward16) An ion with six protons, seven neutrons, and a charge of 2+ has an atomic number of A) four B) five monom o nonesitomyloq orli gniub baenslon o1e tolsw lo 2olusolom yusm woll (S C) six D) seven Toluostom ozolufle 01 ( 17) Molybdenum has an atomic number of 42. Several common isotopes exist, with mass numbers from 92-100. Which of the following can be true? A) Molybdenum atoms can have between 50 and 58 neutrons. B) Molybdenum atoms can have between 50 and 58 protons. C) Molybdenum atoms can have between 50 and 58 electrons.a 12ed gniwollot odi to rloid Warrow_forward(a) A homogeneous mixture which contains water as a solvent is called (b) Ni(CIO4)2-6H2O is hydrated whereas Ni(CIO.)e is (c) NaCl contains an bond whereas O2(g) contains a bond (d) A homogeneous mixture has a and composition (e) Temperature is an because it does not depend on the amount of substance (f) The maximum number of electrons that an orbital can have is (9) The energy of the lowest level in the H atom is (h) Arrange the following subshells in the H atom in order of increasing energy: 3s 4d 2р 4f 3d 2s 3p () Wavelength and frequency of radiation have an relationshiparrow_forward
- According to chemist John Dalton, if one mole of oxygen is combined with two moles of hydrogen to form one mole of water (when hydrogen has an atomic number of 1 and an atomic mass of 1, and oxygen has an atomic number of 8 and an atomic mass of 16), then this compound has an atomic mass: of 42 grams per mole (42 daltons) of 38 grams per mole (38 daltons) of 32 grams per mole (32 daltons) of 20 grams per mole (20 daltons) of 18 grams per mole (18 daltons)arrow_forwardLook up the valence electron configuration, covalent atomic radius, effective nuclear charge, first ionization energy and Pauling electronegativity in Chapter 8 (tables are attached). Examine the above data and answer the following questions. a) Explain why some of the elements like TI and Pb on the lower left of the p block are metallic. b) Explain why some of the elements like C, Si in the center of the p block form covalent bonds. Explain why these bonds formed by the network of these elements (as studied in Chapter 25) tend to be unreactive. c) Explain why the noble Group 8A elements are highly unreactive gases. d) Explain why some elements like F, CI, Br etc, on the upper right of the p block are highly reactive nonmetals.arrow_forwardExplain why lung and soft tissue appear different on a radiograph when they have both an effective atomic number of 7.4?arrow_forward
- Which of the following compounds would you expect to have the highest boiling pointand which the lowest boiling point? Explain your answer.(a) CH3OCH3 (b) CH3COOH (c) CH3CH2CH3arrow_forwarda) Identify the following as element (atomic or molecular), compound or mixture. b) Explain your reasoning and draw a sample of these substances containing 5 particles of that particular material. c) What would be the mass of 5 particles of that particular material? Show your work! H20 N2 C2HSOH Iodine gasarrow_forwardCalculate the coulomb energy for the following three nuclei using the semi-empirical mass formula. a) 19F b) 48Tİ c) 63Cuarrow_forward
- Principles Of Radiographic Imaging: An Art And A ...Health & NutritionISBN:9781337711067Author:Richard R. Carlton, Arlene M. Adler, Vesna BalacPublisher:Cengage Learning
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