The element indium has two naturally occurring isotopes: 113In and 1 In. The 113In isotope has a mass of 112.904 amu and is 4.29% abundant. Which one statement about indium is FALSE? Select one: a. Indium is an example of a non-metal. b. The nucleus of every indium atom in the universe contains 49 protons. C. The nucleus of every 115In atom in the universe contains 66 neutrons. d. The natural abundance of 115in is 95.71%. e. The atomic mass of 115in is 114.906 amu. O O O

The element indium has two naturally occurring isotopes: 113In and 1 In. The 113In isotope has a mass of 112.904 amu and is 4.29% abundant. Which one statement about indium is FALSE? Select one: a. Indium is an example of a non-metal. b. The nucleus of every indium atom in the universe contains 49 protons. C. The nucleus of every 115In atom in the universe contains 66 neutrons. d. The natural abundance of 115in is 95.71%. e. The atomic mass of 115in is 114.906 amu. O O O

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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1. The atomic number of lithium is 3. How many neutrons does an atom of lithium have if it is represented by the symbol shown below? 7Li O A 2 neutrons OB. 13 neutrons C. 4 neutrons O D. 7 neutrons 2. The atomic number of fluorine is 9. How many electrons does an ion of fluorine have if it is represented by the symbol shown below? 19F1- O A 8 electrons O B. 9 electrons C. 10 electrons O D. 20 electrons 3. The electron dot diagram for a neutral atom of chlorine (atomic number 17) is shown below. Which of the following symbols represents a chlorine ion with a stable arrangement of eight valence electrons? CI: A 35C1¹- B. 35C12- C. 35C11+ O D. 35cl
You have a 1kg mass of each of elements A and B. Element A has a higher atomic mass than element B. Which of these is true? a. None of the others. b. A has more atoms than B. c. They have the same number of atoms, d. You cannot say with the information provided. e. B has more atoms vthan A.
How many protons and neutrons are in the nucleus of each of the following atoms? In aneutral atom of each element, how many electrons are present?a. 79Brb. 81Brc. 239Pud. 133Cse. 3Hf. 56Fe
a. What element has 35 protons? b. What element has 83 electrons? c. What element has 25 protons? d. What element has 0 neutrons? e. What element has 18 electrons?
Water contains small amounts of the element fluorine, which helps to strengthen tooth enamel and prevent cavities. What would you expect to happen to the fluorine element when it is added to drinking water? a. Fluorine would lose an electron and would be found as HF. b. Fluorine would gain a proton, becoming a radioactive isotope. c. Fluorine would gain an electron and would be found as F- or HF. d.Fluorine would form a covalent bond with water.
37. Which of the following statements is not correct? A. A cation is formed when an atom loses one or more electrons. B. An anion is formed when an atom gains one or more electrons. 1 mole of neon, Ne, has a mass of 6.02 x 1023 g. 1 mole of chromium, Cr, has a mass of 52.0 g.
2. The most common isotope of carbon has a mass of 12. Carbon has an atomic number of 6.A. How many protons are in an atom of carbon? 17B. How many neutrons are in an atom of carbon?C. How many electrons are in an atom of carbon?D. Another isotope of carbon has a mass of 14. How many protons, neutrons, and electrons are in this isotope?
Periodic Table 15. Write the letter of each statement that is true about the average atomic mass of an element and the relative abundance of its isotopes. a. In nature, most elements occur as a mixture of two or more isotopes. b. Isotopes of an element do not have a specific natural percent abundance. c. The average atomic mass of an element is usually closest to that of the isotope with the natural highest abundance. d. Because hydrogen has three isotopes with atomic masses of about 1 amu, 2 amu and 3 amu, respectively, the average atomic mass of natural is 2 amu.
Which of the following statements is false?a. Atoms of the same element that have different masses are called isotopesb. The masses of isotopes vary because they have a different number ofelectronsc. The mass number of an isotope is the total number of protons and neutronsin the nucleusd. The mass number of an isotope is the total number of protons and neutrons,but without being given the number of electrons.e. Every atom of a particular element has the same number of protons
Which statement is true? O a. Protons and neutrons have the same mass, but electrons are much lighter. All three particles are evenly distributed throughout the atom. Protons are positively charged, neutrons are neutral, and electrons are negatively charged. O b. Protons and neutrons have the same mass, but electrons are much lighter. Protons and neutrons are in the nucleus, and electrons occupy energy levels in the electron cloud. Protons are positively charged, neutrons are negatively charged, and electrons are neutral. OC. Protons, neutrons, and electrons have equal mass and are evenly distributed throughout the atom. Protons are positively charged, neutrons are neutral, and electrons are negatively charged. O d. Protons and neutrons have the same mass, but electrons are much lighter. Protons and neutrons are in the nucleus, and electrons occupy energy levels in the electron cloud. Protons are positively charged, neutrons are neutral, and electrons are negatively charged.
As we saw in the previous problem, lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%; mass 6.0151 amu) and Li-7 (natural abundance 92.5%; mass7.0160 amu). Without doing any calculations, determine which mass is closest to the atomic mass of Li. a. 6.00 amu b. 6.50 amu c. 7.00 amu
Which of the following statements is TRUE, and why? A. Anions are usually larger than their corresponding atoms. B. A neutral atom contains the same number of protons and neutrons. C. Protons and electrons contribute equally to the mass of the atom.