The atomic mass for lead should be calculated by using the weighted average mass method. Concept introduction: Elements can have two or more than two isotopes. Isotopes are the atoms of the same element with different mass numbers due to different number of neutrons in their nuclei. The relative abundance of isotopes varies in nature. For this reason, the atomic mass of an element is calculated by multiplying the mass of each isotope by its percent abundance value and then adding all those values for all isotopes of the element.

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Chapter 4, Problem 81APP

Interpretation Introduction

Interpretation:

The atomic mass for lead should be calculated by using the weighted average mass method.

Concept introduction:

Elements can have two or more than two isotopes. Isotopes are the atoms of the same element with different mass numbers due to different number of neutrons in their nuclei. The relative abundance of isotopes varies in nature. For this reason, the atomic mass of an element is calculated by multiplying the mass of each isotope by its percent abundance value and then adding all those values for all isotopes of the element.

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