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

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

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. Fill in the following table (each column represents a different isotope): b. Complete Chemical Symbol Element Name (specific isotope) Atomic Number Mass Number Number of Protons Number of Neutrons Number of Electrons (free atom) Number of Valence Electrons Group Number Group Name (if there is one) Period Metal/nonmetal? a. 55 Cr (skip for 55Cr) 38 50 C. 54 74
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Q.3 A neutral atom has a mass number of 80 and has 45 neutrons. Write its complete symbol. Q.4 An atom has two more protons and two more electrons than the atom in question 3. What is its complete symbol?
3. Which statement accurately describes the atoms of a specific element? A zinc, Zn, atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus. An indium, In, atom contains 115 protons inside the nucleus and 49 neutrons outside the nucleus. A scandium, Sc, atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus. An aluminum, Al, atom contains 27 electrons and 27 protons inside the nucleus. CLEAR ALL
Beryllium has an atomic number of 4. Which of the following statements is true of a neutral Beryllium atom? 1. It has 4 protons, 4 electrons, and 4 neutrons. O 2. It has 4 protons, 4 electrons, and 2 neutrons. O 3. It has 2 protons, 2 electrons, and 0 neutrons. 4. It has 2 protons, 2 electrons, and 2 neutrons.
2. Which of the following best describes an element? a. A neutral substance consisting of a cation and an anion b. A substance consisting of two non-metals C. A substance consisting only of atoms having the same nur of protons. d. A substance that can only be found as a solid e. A substance consisting only of atoms having the same num of neutrons O a O b O c dl
5. Complete the following table of neutral atoms of isotopes. Nuclear Symbol 39Sr Ne 33P Atomic Number 50 Mass Number 82 C. d. Inactive gases are called e. Elements in the middle of the periodic table The sum of the protons and neutrons Protons Malleable is a property of a The vertical columns are called families or 20 Neutrons f. g. The elements are arranged by atomic h. Calcium is a(n) metal. i. A has properties of both metals and nonmetals 22 6. Answer the question or complete the following statements about the Periodic Table. a. Group I metals are called b. 76 Electrons 34 lectron dot symbol foroach of following
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D. Isotopes and Atomic Mass 1. Nuclear Symbol Protons Neutrons Electrons 107 47Ag 109 47Ag 2. Nuclear Symbol Isotopic Mass Percent Abundance 107 47Ag 106.9 51.84% 109 47Ag 108.9 48.15% Find atomic mass of silver (Show calculations here) Questions and Problems Q4 A neutral atom has a mass number of 80 and has 45 neutrons. Write its atomic symbol. Q5 An atom has two more protons and two more electrons than the atom in Question 4. What is its atomic symbol?
An atom has two isotopes. the first isotope has a mass of 80.92 amu and a fractional abundance of 32.12%, and the second isotope has a mass of 78.23 amu. Find the atomic mass of this atom.