These 3 noble gases are Helium (He), Neon (Ne), and Argon (Ar). There are only 3 elements as noble gases within the first 20 elements of the periodic table.
Lithium, Beryllium, Sodium, Magnesium, Aluminium, Potassium, and Calcium are metallic elements in the first 20 elements of the periodic table while Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon are the non-metallic elements in the first 20 elements of the periodic table. The first 20 elements of the periodic table are present in our surroundings and these react chemically in our daily life also. The first 20 elements always help to have a good idea about the different groups of elements. It is to be noted here that about 99% of the body mass of human beings is composed of 6 elements of these first 20 elements of the periodic table. Here is the list of the first 20 elements, listed below in order:įirst 20 Elements of the Periodic Table List In this article, you will know more about the list of the first 20 elements of the periodic table with their symbols, atomic number, and atomic mass. The compounds are formed by establishing the chemical bond to make the atoms of one element closer to that of another element. When the number of electrons is changed then it forms an ion (whether positive or negative) but it doesn’t change the identity or features of an element. Atoms of elements also have electrons that move around the atomic nucleus. The nucleus of atoms of elements may have neutrons along with protons.
Elements in chemistry are generally considered the building blocks of matter. An Element is identified by the number of protons present in its nucleus. Matter compulsorily has to have one or more than one proton in its nucleus to form an element. First 20 Elements of the Periodic Table: In the study of matter in chemistry, electron, proton, and neutron play a vital role to specify the element.
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