chemical element or element is a species of atoms having the same number of protons in theiratomic nuclei (i.e. the same atomic numberZ). There are 118 elements that have been identified, of which the first 94 occur naturally on Earth with the remaining 24 being synthetic elements. There are 80 elements that have at least one stable isotope and 38 that have exclusivelyradioactive isotopes, which decay over time into other elements. Iron is the most abundant element (by mass) making up Earth, while oxygen is the most common element in the crust of Earth.

Chemical Elements, also known as elements, are the chemical substances that consist of atoms which have same number of protons in their atomic nuclei.

All the Chemical Elements that are identified are listed in the modern periodic table or simply the periodic table. Out of 118 Chemical Elements, a total of 80 Chemical Elements have at least one stable isotope whereas the remaining Chemical Elements (38 elements) have radioactive isotopes which decay with time and lead to the formation of other elements. The most common Chemical Element in the earth’s crust is Oxygen and the most abundant Chemical Element found on earth is Iron. Chemical Elements make up approximately 15% of the matter in the universe.

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