To differentiate: A radioisotope from other types of isotope. Concept introduction: The elements present in the nature normally occur as a mixture of isotopes. Isotopes vary in the number of neutrons and thereby affect the mass number. The mass number is the total number of protons and neutrons present in the nucleus of an atom. The physical properties of an atom are determined by its mass number. Therefore, the isotopes vary in their physical properties. The chemical properties of an atom are determined by its number of electrons. Isotopes have the same number of electrons. Therefore, they have similar chemical properties.

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Chapter 2.1, Problem 6LO

Summary Introduction

To differentiate: A radioisotope from other types of isotope.

Concept introduction: The elements present in the nature normally occur as a mixture of isotopes. Isotopes vary in the number of neutrons and thereby affect the mass number. The mass number is the total number of protons and neutrons present in the nucleus of an atom. The physical properties of an atom are determined by its mass number. Therefore, the isotopes vary in their physical properties. The chemical properties of an atom are determined by its number of electrons. Isotopes have the same number of electrons. Therefore, they have similar chemical properties.

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