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: Consider the following three pairs of species: I. 55Fe3+ and 56Fe2+ II. Na+ and Ne III. 13C and 14C Which of the following statements is  NOT true?   A) I and III both contain pairs of isotopes. B) II shows two species with different number of electrons. C) III shows two species with different mass numbers, but the same atomic numbers. D) I shows two species with the same number of protons.

Problem

Consider the following three pairs of species:

I. 55Fe3+ and 56Fe2+

II. Na+ and Ne

III. 13C and 14C

Which of the following statements is  NOT true?

 

A) I and III both contain pairs of isotopes.

B) II shows two species with different number of electrons.

C) III shows two species with different mass numbers, but the same atomic numbers.

D) I shows two species with the same number of protons.