Welcome to the Periodic Table category, the cornerstone of chemical knowledge. Explore the fascinating arrangement of elements that forms the basis of our understanding of matter. Delve into the periodic trends, such as atomic size, electronegativity, and ionization energy, which govern the behavior of elements. Discover the properties and characteristics of different groups and periods within the table. Unravel the significance of periodicity in predicting chemical reactivity and understanding the relationships between elements. Immerse yourself in the captivating realm of the periodic table and unlock the secrets of the building blocks of the universe.
Oxygen is a chemical element with the symbol O and atomic number 8. It is a highly reactive non-metal and is the third most abundant element in the universe. Oxygen is a colorless, tasteless, and odorless gas that is essential for the survival of all known forms of life. Oxygen is the most common element … Read more
Nitrogen is a chemical element with the symbol N and atomic number 7. It is a colorless, odorless, tasteless, and non-toxic gas. Nitrogen is all around us everywhere, as it is the transparent gas that makes up almost 75% of the Earth’s atmosphere. Since pure nitrogen does not react easily, its liquid form can be … Read more
Boron is a chemical element with the symbol B and atomic number 5. It is a metalloid, which means it has properties of both metals and non-metals. Among the hardest man-made substances on Earth are some boron compounds (boron carbide), and only diamond is harder. This element is a very hard material and becomes even … Read more
Beryllium gets its name from the Greek word beryllos, and from the Latin beryllus meaning “green gemstone“, referring to the mineral beryl. Beryllium is the lightest alkali earth metal, and does not share many of the properties of the group, it is a strong and brittle metal. For example, it does not react with water … Read more
Helium is a chemical element with the symbol He and atomic number 2, is the second lightest element after hydrogen. This transparent gas was discovered in 1868 by Sir William Ramsay. Today, we know that a quarter of all atoms in the Universe are helium. It is one of the main gases in the atmospheres … Read more
Lithium is a chemical element with the symbol Li and atomic number 3. Lithium is the lightest of all metals and the least dense solid element. For this reason, it could theoretically float easily on water. It is a soft, silver-white metal that belongs to the alkali metal group of the periodic table. Pure lithium … Read more
Hydrogen is a chemical element with the symbol H and atomic number 1. Hydrogen is the first element in the periodic table because it is the simplest atom of them all: it contains only one proton and one electron. On the other hand, pure hydrogen is a transparent gas. Hydrogen is a member of the … Read more
