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: Be sure to answer all parts.One isotope of a metallic element has the mass number 65 and 35 neutrons in the nucleus. The cation derived from the isotope has 28 electrons. What is the atomic number? Wr

Problem

Be sure to answer all parts.

One isotope of a metallic element has the mass number 65 and 35 neutrons in the nucleus. The cation derived from the isotope has 28 electrons. 

What is the atomic number? 

Write the atomic symbol for this element. 

What is the charge of this species?

Solution

The atomic number is equal to # of protons while the mass # is equal to the # protons + # of neutrons. If we have 65 as mass # and 35 as #  of neutrons, 65-35 = 30 protons.

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