Biology Now
Biology Now
1st Edition
ISBN: 9780393644142
Author: Anne Houtman, Megan Scudellari, Cindy Malone, Anu Singh-Cundy
Publisher: W. W. Norton & Company
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Chapter 2, Problem 3TQ
Summary Introduction

All materials are made from atoms. More than hundred different types of atom that has chemical and physical properties are called an element. An atom is the smallest unit of an element with distinctive properties. Every atom is made up of a nucleus consisting of neutrons (neutral charge) and protons (positive charge), and negatively charged electrons that surrounds the nucleus.

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Macromolecules | Classes and Functions; Author: 2 Minute Classroom;https://www.youtube.com/watch?v=V5hhrDFo8Vk;License: Standard youtube license