Electronics › lesson 01 of 100 · Beginner

Electric Charge and Atoms

This lesson is the first in the Electronics course and will teach you the basics of electric charge and atomic structure. After completing this lesson, you will be able to understand the fundamental concepts of electric charge and how it relates to atoms.

Atoms have a structure that includes protons, neutrons, and electrons, and the arrangement of these particles determines the electric charge of the atom.

The simplest way to understand electric charge is to consider a concrete example: a balloon rubbed against hair. The balloon becomes negatively charged because it gains electrons from the hair. This happens because the atoms in the balloon and hair have a structure that includes protons, neutrons, and electrons. The protons and neutrons are found in the nucleus, while the electrons orbit around it.

The protons have a positive charge, while the electrons have a negative charge. The neutrons have no charge. When an atom gains or loses electrons, its electric charge changes.

The number of protons in an atom's nucleus determines the element of the atom, and each element has a unique number of protons in its atoms.

예시

• Hydrogen atomHas one proton and one electron
• Oxygen atomHas eight protons and eight electrons
• Sodium atomHas eleven protons and eleven electrons

전체 과정은 수업마다 5문제로 확인하고, 내 단계에 맞추며, 멈춘 자리를 기억합니다.