Periodic Table 

         The periodic table is more than just a chart of elements. It's a key to unlocking the secrets of the universe.

At its core, the periodic table is a tool for understanding the building blocks of matter. From the tiniest atoms to the largest molecules, every substance in the world can be broken down into its elemental components. 

Fast forward to the 19th century, when scientists started to discover new elements at an unprecedented rate. But how could they make sense of all these new discoveries? That's where Dmitri Mendeleev comes in. He was the first to organize the elements into a logical pattern, based on their atomic weight and chemical properties. This became known as the periodic table, and it revolutionized the field of chemistry.

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Hydrogen

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Hydrogen is a chemical element with atomic number 1 and the symbol H on the periodic table.

The name "hydrogen" comes from the Greek words "hydro" (meaning water) and "genes" (meaning generator).

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Helium

Helium is a chemical element with the symbol "He" and atomic number 2. This means that a helium atom has 2 protons in its nucleus. It is the second element on the periodic table and is represented by the symbol "He."

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Lithium

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Lithium is a chemical element with the symbol "Li".The atomic number of lithium is 3, and its atomic mass is approximately 6.941 atomic mass units (u). The atomic number represents the number of protons in the nucleus of an atom, and for lithium, it has 3 protons.

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Beryllium 

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Beryllium is a chemical element with the symbol "Be". Beryllium is a light, silver-grey, relatively soft metal that is strong but brittle. It is an Alkali Earth metal. The atomic number of beryllium is 4, and its atomic mass is approximately 9.012 atomic mass units (u).

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Boron

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Boron, a chemical element with the symbol "B" and atomic number  5.It has an atomic structure that consists of five protons, five electrons, and six neutrons. Atomic mass is approximately 10.81 atomic mass units (u).

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Carbon 

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Carbon, a chemical element with the symbol "c" and atomic number  6 and its atomic mass is approximately 12.01 atomic mass units (u).

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