- Gold 604.91
- Silver 6.81
- Palladium 212.30
- Platinum 214.15
You may be familiar with O, H, and Ag as elements from the periodic table.
However, there are actually up to 118 elements to navigate through. The periodic table displays all the elements that scientists have discovered so far.
Here's a brief overview of what the system is, how to read it, and how to use it.
The periodic table was invented by the Russian chemist Dmitri Mendeleev in 1869. At that time, only 69 elements were known. Since then, many more have been discovered, and scientists worldwide are striving to find the next element, number 119.
Mendeleev discovered that every seventh element shares common properties. He organized the elements into 18 groups based on similarities in the chemical behavior of substances, which make up the vertical columns in the system. Additionally, the elements are arranged in seven periods horizontally, indicating how many electron shells the elements have around them.
He, however, left gaps as there were elements that had not yet been discovered. Subsequently, more elements were found that fit into the Russian chemist's table.
The periodic table is divided into 18 vertical groups, which share chemical properties. For example, Group 1 consists of alkali metals, which are soft and malleable metals, highly reactive (they can, in some cases, react violently with water), while Group 18 contains noble gases.
Horizontally, there are "periods," indicating how many electron shells the elements have.
Additionally, the different elements are indicated with colors based on their physical state: gas, liquid, solid, or unknown.
If you take a quick look, you'll notice that each individual element is numbered, starting from 1 (H – hydrogen) and going up to element number 118.
The atomic number determines the number of protons in the nucleus. Therefore, the lightest element is hydrogen, with one proton in the nucleus. The heaviest naturally occurring element is number 94, plutonium, which has 94 protons.
The first 94 elements exist naturally, while elements 95 to 118 have been synthesized in laboratories, nuclear reactors, or through nuclear explosions.
These numbers trace back to Niels Bohr, who, in 1913, proposed his atomic theory. This theory provided the first theoretical explanation that an atom is constructed with a nucleus containing protons and neutrons.
The periodic table enables an overview of the various elements and their interactions. Our understanding of the compounds and interactions of elements allows for the development of new technologies, foods, materials, and more.
For example, consider table salt, a harmless chemical compound composed of an otherwise highly explosive metal (element number 11) and toxic chlorine gas (element number 17).
Many high-tech products in our daily lives also leverage properties of specific elements, such as various electronics (silicon), smartphones (tantalum), and fuel cells (platinum). In this way, the periodic table aids in comprehending and harnessing the diverse properties of elements to create novel and innovative products and solutions.
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