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<h2>Elements</h2>
An element is a chemical substance that can't be divided or changed into other chemical substances by any ordinary chemical means. The smallest unit of an element is the atom.
<div class="ns-school-emp">
<h3>Definition: Element</h3>
<div class="ns-school-defn">
An element is a substance that cannot be broken down into other substances through chemical means.
</div>
</div>
There are \(\text{112}\) officially named elements and about \(\text{118}\) known elements. Most of these are natural, but some are man-made. The elements we know are represented in the periodic table, where each element is abbreviated to a chemical symbol. The table below gives the first \(\text{20}\) elements and some of the common <a data-lesson="occurrence-preparation-and-properties-of-transition-metals-and-their-compounds" data-subject="chemistry" data-tutorial="transition-metals" href="https://app.ulearngo.com/chemistry/transition-metals/occurrence-preparation-and-properties-of-transition-metals-and-their-compounds">transition</a> metals.
<div class="ns-school-defn2">
<h3>Did You Know?</h3>
Recently it was agreed that two more elements would be added to the list of officially named elements. These are elements number \(\text{114}\) and \(\text{116}\). The proposed name for element \(\text{114}\) is flerovium and for element \(\text{116}\) it is moscovium. This brings the total number of officially named elements to \(\text{114}\).
</div>
<div>
<table summary=" ">
<tbody>
<tr>
<td>
Element name
</td>
<td>
Element symbol
</td>
<td>
Element name
</td>
<td>
Element symbol
</td>
</tr>
<tr>
<td>
Hydrogen
</td>
<td>
\(\text{H}\)
</td>
<td>
Phosphorus
</td>
<td>
\(\text{P}\)
</td>
</tr>
<tr>
<td>
Helium
</td>
<td>
\(\text{He}\)
</td>
<td>
Sulfur
</td>
<td>
\(\text{S}\)
</td>
</tr>
<tr>
<td>
Lithium
</td>
<td>
\(\text{Li}\)
</td>
<td>
Chlorine
</td>
<td>
\(\text{Cl}\)
</td>
</tr>
<tr>
<td>
Beryllium
</td>
<td>
\(\text{Be}\)
</td>
<td>
Argon
</td>
<td>
\(\text{Ar}\)
</td>
</tr>
<tr>
<td>
Boron
</td>
<td>
\(\text{B}\)
</td>
<td>
Potassium
</td>
<td>
\(\text{K}\)
</td>
</tr>
<tr>
<td>
Carbon
</td>
<td>
\(\text{C}\)
</td>
<td>
Calcium
</td>
<td>
\(\text{Ca}\)
</td>
</tr>
<tr>
<td>
Nitrogen
</td>
<td>
\(\text{N}\)
</td>
<td>
Iron
</td>
<td>
\(\text{Fe}\)
</td>
</tr>
<tr>
<td>
Oxygen
</td>
<td>
\(\text{O}\)
</td>
<td>
Nickel
</td>
<td>
\(\text{Ni}\)
</td>
</tr>
<tr>
<td>
Fluorine
</td>
<td>
\(\text{F}\)
</td>
<td>
Copper
</td>
<td>
\(\text{Cu}\)
</td>
</tr>
<tr>
<td>
Neon
</td>
<td>
\(\text{Ne}\)
</td>
<td>
Zinc
</td>
<td>
\(\text{Zn}\)
</td>
</tr>
<tr>
<td>
Sodium
</td>
<td>
\(\text{Na}\)
</td>
<td>
Silver
</td>
<td>
\(\text{Ag}\)
</td>
</tr>
<tr>
<td>
Magnesium
</td>
<td>
\(\text{Mg}\)
</td>
<td>
Platinum
</td>
<td>
\(\text{Pt}\)
</td>
</tr>
<tr>
<td>
Aluminium
</td>
<td>
\(\text{Al}\)
</td>
<td>
Gold
</td>
<td>
\(\text{Au}\)
</td>
</tr>
<tr>
<td>
Silicon
</td>
<td>
\(\text{Si}\)
</td>
<td>
Mercury
</td>
<td>
\(\text{Hg}\)
</td>
</tr>
</tbody>
</table>
<div>
Table: List of the first 20 elements and some common transition metals
</div>
</div>
<section></section>

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Elements

Chemistry generally explores the substances of which matter is composed, the investigation of their properties and reactions, and the use of such reactions to form new substances. 

Chemistry

Explore the arrangement of elements and learn about materials, mixtures, pure substances, and separation techniques, including chemical formulae and important concepts such as periods in the periodic table and chemical properties of groups.


Elements

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