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<title>Al Azhar 9th Grade Lesson Notes</title>
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<h3 id="title" class="align-center">Al Azhar 9th Grade Lesson Notes</h3>
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<a href="/about/author.html" class="sidebar-link link">About the Author</a>
<a href="/about/school.html" class="sidebar-link link">About School</a>
<a href="/lessons" class="sidebar-link link">Lessons</a>
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<h4>Table of Contents</h4>
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<h1 class="banner-text" id="banner-txt">Atom: Introduction</h1>
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<h1 id="parts-of-atom">Parts of An Atom</h1>
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<img src="/assets/images/atoms/parts.svg" alt="">
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<p class="subtitle">artist's representation of an atom. Bohr's Model. Colors may be labelled different.</p>
<h1 id="symbol">Symbol of An Atom</h1>
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<img src="/assets/images/atoms/oxygen_symbol.svg" alt=""
style="flex: 1 200px; margin: 30px; min-width: 0px; max-width: 600px;">
<img src="/assets/images/atoms/symbol.svg" alt=""
style="flex: 1 200px; margin: 30px; min-width: 0px; max-width: 600px;">
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<p class="subtitle">(picture on the left) An example of an atom symbol, (picture on the right) The format of
an atom symbol</p>
<h1 id="proton-electron-neutron-count">Determining the number of Protons, Electrons, and Neutrons</h1>
<h2 id="proton-electron-neutron-count--protons-and-electrons">Protons and Electrons</h2>
<p>If not electrically charged (will be discussed later), the proton and electron number will be the same as
the <strong>atom number</strong>.</p>
<h2 id="proton-electron-neutron-count--neutrons">Neutrons</h2>
<p>Neutrons can be determined by using this following formula: <br>
<strong>Atomic Mass</strong> - <strong>Atomic Number</strong> = Neutron Number
<h2 id="proton-electron-neutron-count--example">Examples</h2>
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<strong>Proton:</strong> 11<br>
<strong>Electron:</strong> 11<br>
<strong>Neutron:</strong> 23 - 11 = 12
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style="max-width: 200px !important; margin: 20px;">
<p>
<strong>Proton:</strong> 6<br>
<strong>Electron:</strong> 6<br>
<strong>Neutron:</strong> 12 - 6 = 6
</p>
</div>
<h1 id="ions">Ions</h1>
Electron count will be added or subtracted by ion charge. <br>
If the ion charge is positive, subtract the electron count. <br>
If the ion charge is negative, add the electron count. For example:
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<img src="/assets/images/atoms/carbon_symbol_ion.svg" alt=""
style="max-width: 200px !important; margin: 20px;">
<p>
<strong>Proton:</strong> 6<br>
<strong>Electron:</strong> 6 + 4 = 10<br>
<strong>Neutron:</strong> 12 - 6 = 6
</p>
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<img src="/assets/images/atoms/magnesium_symbol_ion.svg" alt=""
style="max-width: 200px !important; margin: 20px;">
<p>
<strong>Proton:</strong> 6<br>
<strong>Electron:</strong> 6 - 2 = 4<br>
<strong>Neutron:</strong> 24 - 12 = 12
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