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: The isotope 3475 Se is used medically for the diagnosis of pancreatic disorders.How many protons, electrons, and neutrons does an atom of 3475 Se have?

Solution: The isotope 3475 Se is used medically for the diagnosis of pancreatic disorders.How many protons, electrons, and neutrons does an atom of 3475 Se have?

Problem

The isotope 3475 Se is used medically for the diagnosis of pancreatic disorders.

How many protons, electrons, and neutrons does an atom of 3475 Se have?

Solution

The symbol of an element contains its mass number or atomic mass and its atomic number.

Recall that the mass number or atomic mass of an element represents the total number of its protons and neutrons, while the atomic number represents the total number of its protons. For an element that is neutral, the atomic number also represents the total number of its electrons.

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