BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
10th Edition
ISBN: 9781305967359
Author: STARR
Publisher: CENGAGE L
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Chapter 2, Problem 3SA
Summary Introduction

Introduction:

An atom is defined as the smallest unit of a substance. Atoms contain protons, electrons, and neutrons. Elements are pure substances that are composed of atoms having entirely the same characteristic number of protons.

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