atomsprobs - S olomons Study Notes General Chemistry I Fall...

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Unformatted text preview: S olomons Study Notes General Chemistry I Fall 2011 Solomon Weiskop PhD Practice Problems: Atoms Ions & Isotopes General Chemistry 1 Study Notes & Practice Problems are available to print out by registering at www.solomonlinetutor.com Solomon Weiskop PhD Copyright 2011 1 [#1] Which has an atomic number of 35 and a mass number of 80? (a) 35 Br (b) 80 Hg (c) 35 Cl (d) 80 Br (e) 35 Hg [#2] How many protons, neutrons and electrons does a 57 Fe atom have? (a) 26p 57n 31e (b) 26p 26n 57e (c) 31p 26n 31e (d) 26p 31n 26e (e) 57p 26n 57e [#3] Identify the correct statement(s): (a) 14 C and 14 N have the same number of neutrons (b) 14 C and 14 N are isotopes of each other because their mass numbers are the same (c) has same number of electrons as 14 N (d) both (a) and (b) correct (e) both (b) and (c) correct [#4] In a mass spectrometry experiment, the mass of a single atom was found to be . Identify this atom. (a) oxygen-16 (b) sodium-23 (c) neon-20 (d) nitrogen-14 (e) hydrogen-2 [#5] Which one statement is incorrect ? (a) Almost all the mass of an atom is concentrated in the nucleus. (b) A neutral atom has the same number of protons as electrons. (c) The electrons in an atom occupy a very large volume compared to the nucleus. (d) The protons and neutrons in the nucleus are very densely packed. (e) The number of protons and neutrons in a neutral atom of a given element is always the same. 2 [#6] Which one statement is incorrect ? (a) 14 C and 14 N are isotopes of one another because they have the same mass number (b) ions contain same number of electrons as 20 Ne atoms (c) ions contain same number of electrons as 20 Ne atoms (d) 18 O atoms and ions have same number of neutrons (e) 16 O atoms contain 8 neutrons [#7] Which of the following concepts did Dalton include in his atomic theory? I isotopes II ions III protons IV neutrons V electrons (a) I only (b) II and III (c) II III and IV (d) all of them (e) none of them [#8A] Which of the following is not part of Daltons atomic theory?...
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atomsprobs - S olomons Study Notes General Chemistry I Fall...

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