How many elements are there in world
The correct answer and explanation is:
There are currently 118 known elements on the periodic table. These elements range from hydrogen (with the atomic number 1) to oganesson (with the atomic number 118). They are classified into several categories based on their properties, such as metals, nonmetals, and metalloids.
Elements are the fundamental building blocks of matter. They combine in various ways to form compounds, which are the substances that make up the materials we encounter in daily life. For instance, water is a compound made of hydrogen and oxygen. The discovery of elements started thousands of years ago, but the modern classification and understanding of elements began in the 19th century with the development of the periodic table by Dmitri Mendeleev.
Each element is unique because of its atomic structure. The number of protons in an element’s nucleus, also known as its atomic number, defines the element. For example, hydrogen has one proton, while carbon has six. These atomic numbers help organize elements in the periodic table.
The periodic table itself is arranged in periods (rows) and groups (columns), with elements sharing similar properties appearing in the same group. For example, elements in Group 1 (alkali metals) are highly reactive, while those in Group 18 (noble gases) are very stable.
While there are 118 elements, scientists continue to explore the possibility of discovering new elements beyond oganesson. These elements would need to be synthesized in laboratories since they do not naturally occur on Earth. The discovery of new elements would also require confirmation of their stability and atomic properties.