1. An element has a low ionization energy and a low electron affinity. What is it most likely to be? A) a halogen B) a Group 16 (VIA) element C) a noble gas D) an alkali metal 2. Suppose that three isotopes of element X are in nature as follows: ISOTOPE % ABUNDANCE 1 2 3 RELATIVE ATOMIC MASS 110.0 105.0 100.0 60.0 30.0 10.0 What is the relative atomic mass of the naturally occurring mixture of element X? A) 102.5 amu B) 105.0 amu C) 107.5 amu D) 315.0 amu

1. An element has a low ionization energy and a low electron affinity. What is it most likely to be? A) a halogen B) a Group 16 (VIA) element C) a noble gas D) an alkali metal 2. Suppose that three isotopes of element X are in nature as follows: ISOTOPE % ABUNDANCE 1 2 3 RELATIVE ATOMIC MASS 110.0 105.0 100.0 60.0 30.0 10.0 What is the relative atomic mass of the naturally occurring mixture of element X? A) 102.5 amu B) 105.0 amu C) 107.5 amu D) 315.0 amu

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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ISOTOPES Isotopes are atoms that have the same atomic number but different mass number. Most elements have two or more isotopes. For example, there are three isotopes of hydrogen: 1H, 2H, ³H. Since these isotopes are all hydrogen element, they should obviously all have the same atomic number of 1, but as you can see they all have different mass numbers. And the reason for having different mass numbers should be due to having different neutron numbers: 'H having zero neutron; 2H one neutron; ³H two neutrons. QUESTION Element mercury has six isotopes: 198Hg, 199H9, 200Hg, 201H9, 202H9, and 204H9. The abundance (frequency) of each of these isotopes is measured to be 10.20%, 16.90%, 23.40%, 13.10%, 29.90%, and 6.500%, respectively. Calculate the average atomic mass for mercury. This result should be very close to the number you can find in the Hg box in the periodic table. Hint: You can solve this question if you carefully exam the solution procedures you already exercised in the previous…
Calculate the average atomic mass of silver using the following data:
of the same element must have different numbers of neutrons. isotopes O electron orbitals Ovalences O ions O shells O electrons 9 DELL C 30 $ & 10 f do in % 9 6 y h v lº 3 * 00 9 k 45 O 00
Calculate the atomic weight of antimony, which has two isotopes with the following properties: antimony-121 (120.90 amu, 57.21% natural occurrence) and antimony-123 (122.90 amu, 42.79% natural occurrence).
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An hypothetical element has the following distribution of natural occurring isotopes: 60.795% at a mass of 281.99481 amu, 22.122% at a mass of 283.99570 amu, and the remainder has a mass of 286.99423 amu. Calculate the atomic mass of the element.
Which of the following describes the element Li. Choose all that apply. reacts vigorously with alkali metals to form salts forms a basic solution in water is very reactive as a metal is one of the group of the least reactive elements is found in nature only combined with other elements consists of diatomic molecules in elemental form
Researchers from Lund University in Sweden created it by slamming atoms of one element, calcium, into atoms Scientists confirm new element 115 after atoms collide By Ben Brumfield (1) As though it wasn't hard enough to memorize the names and atomic weights of 117 elements in the periodic number of 115 on the periodic table, the list of all elements known to humanity. table, scientists have now confirmed a new one. of another called americium. . Use paragraph 1 and 2 to describe how the element with 115 protons was createc. (3)The Swedes were the second groun of scientists to create the element. A group of Russian scientists put together the same type of atom in 2004. (4)But the new experiment corroborated their work and confirmed 115's existence. Still, this doesn't mean that you'll see element 115 on the next periodic table poster that gets published. The discovery still has to be approved by a committee composed of members of the International Union of Pure and Applied Chemistry and…
7. Which of the following statements about the isotope Y is/are correct? (1) Y has 5 outermost shell electrons. (2) i5Y has 15 neutrons. (3) Y is in Group V in the Periodic Table. (1) only (2) only А. В. (1) and (3) only (2) and (3) only С. D. 8. An unknown element has 2 outermost shell electrons. Which of the following statements concerning this element are INCORRECT? (1) It must conduct electricity. (2) It must be a metal. (3) It has at least 2 protons. (1) and (2) only (1) and (3) only (2) and (3) only А. В. С. D. (1), (2) and (3) 9. The relative atomic masses of elements are seldom whole numbers because А. atoms of some elements have different atomic numbers. В. atoms of some elements have different masses. С. atoms of some elements have different numbers of electrons. D. atoms of some elements can form ions. 10. Which of the following statements is correct? А. All elements must contain protons, neutrons and electrons. В. Atoms of the same element must contain the same number of…
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Finding atomic mass from isotope mass and natural abundance A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar System. Mass-spectroscopic analysis produced the following data on the isotopes of tin in these samples: isotope 119 S Sn 118 Sn Sn mass relative (amu) abundance 118.9 93.3% Explanation 117.9 Use these measurements to complete the entry for tin in the Periodic Table that would be used on 98765 ALEKS. Be sure your answers have the correct number of significant digits. Caution: your correct answer will have the same format but not necessarily the same numbers as the entry for tin in the Periodic Table we use here on Earth. 6.7% X Check 3 ? O ol Ar ve Graw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessi