Ch.2 - Atoms & ElementsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: Write the atomic symbol  for each of the isotopes described below.a. number of protons = 27, number of neutrons = 31

Solution: Write the atomic symbol  for each of the isotopes described below.a. number of protons = 27, number of neutrons = 31

Problem

Write the atomic symbol  for each of the isotopes described below.

a. number of protons = 27, number of neutrons = 31

Solution
  • Recall that in nuclear notation:

  • Atomic mass can be calculated by getting the sum of # of protons and neutrons.
  • Atomic # can give us the identity of the element where it is also equal to the # of protons (atomic # = # of protons)
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