A Detailed Understanding Of Atomic Number and The Atomic Numbers of All The 118 Elements

    Science can often feel like an overwhelming subject for many; however, it is a necessity in your everyday life. The aim of science is simple — to find out all about the order in the universe and organise and define that information based on that order. 

    With the discovery of elements, the next step was taken to understand whether the data of each element was different or not. Mendeleev was among the first who started organising this data or the elements based on their atomic weights. 

    Once a detailed study was done, scientists slowly rearranged and organised the elements depending on the proton numbers in the nucleus. It is, in simple words, called the atomic number, and here, detailed information would be provided on all the 118 elements and their atomic numbers


    What Are Elements? 

    At first, the chemical behaviour intrigued scientists into classifying matter into different elements. What is chemical behaviour? The ability of an atom to combine with another atom. What does chemical behaviour depend on? 

    The type and number of chemical bonds that one atom can create with another define chemical behaviour. 

    Can two atoms show the same kind of chemical behaviour? If two different atoms have the same kind of bond, then their chemical behaviour can be similar. 


    Atomic Number- How Is It Defined? 

    Defining atomic numbers should be done when students are at their chemistry foundation level. The atomic number of any element is the number of protons present within the nucleus of each atom of that particular element. 

    Therefore, each element can be differentiated from other elements depending on their total number of protons, defining their chemical behaviour. 


    The periodic table gives you detailed data of all the elements, arranged in their atomic numbers in increasing order. The atomic number is positioned above the element symbol. You would see that Hydrogen on its upper left has the number 1, which is the atomic number. It is known that atoms are neutral; therefore, it is easy to figure out that the number of protons would equalCaesium the number of electrons. 

    What Should You Know About THe History Of Atomic Numbers? 

    Leucippus and Demokritos were the first ones who thought that the earth and the universe might be made of small particles, which they termed atoms. However, Aristotle was not of the same view. 

    Later, atoms are considered the central or the structural blocks of everything, and except for common hydrogen forms, each comes with electrons, protons, and neutrons. 

    Isotopes are defined as atoms that come with the same atomic number but have different neutron numbers. When it comes to the isotopic mass of any isotopic mixture within a defined environment, it determines the atomic weight of that element. 


    Orbital Energy Levels


    Electrons are located at a particular energy level; these energy level sections are called orbitals. The first orbital can consist of a maximum of two electrons. An easy way to understand how electrons are distributed is through diagrams. 

    The atomic number of any element would tell you the number of protons that are present. An example would be the atomic number of carbon is 6; therefore, the distribution would be 2,4. If an atom comes with an atomic number of 13, the distribution would be 2,8,2. 


    All The Elements And Their Atomic Numbers 

    Let us find out What are the 118 elements of the periodic table.

    Element Symbol Atomic Number
    Hydrogen H 1
    Helium He 2
    Lithium Li 3
    Beryllium Be 4
    Boron B 5
    Carbon C 6
    Nitrogen N 7
    Oxygen O 8
    Fluorine F 9
    Neon Ne 10
    Sodium Na 11
    Magnesium Mg 12
    Aluminium Al 13
    Silicon Si 14
    Phosphorous P 15
    Sulfur S 16
    Chlorine Cl 17
    Argon Ar 18
    Potassium K 19
    Calcium Ca 20
    Scandium Sc 21
    Titanium Ti 22
    Vanadium V 23
    Chromium Cr 24
    Manganese Mn 25
    Iron Fe 26
    Cobalt Co 27
    Nickel Ni 28
    Copper Cu 29
    Zinc Zn 30
    Gallium Ga 31
    Germanium Ge 32
    Arsenic As 33
    Selenium Se 34
    Bromine Br 35
    Krypton Kr 36
    Rubidium Rb 37
    Strontium Sr 38
    Yttrium Y 39
    Zirconium Zr 40
    Niobium Nb 41
    Molybdenum Mo 42
    Technetium Tc 43
    Ruthenium Ru 44
    Rhodium Rh 45
    Palladium Pd 46
    Silver Ag 47
    Cadmium Cd 48
    Indium In 49
    Tin Sn 50
    Antimony Sb 51
    Tellurium Te 52
    Iodine I 53
    Xenon Xe 54
    Cesium Cs 55
    Barium Ba 56
    Lanthanum La 57
    Cerium Ce 58
    Praseodymium Pr 59
    Neodymium Nd 60
    Promethium Pm 61
    Samarium Sm 62
    Europium Eu 63
    Gadolinium Gd 64
    Terbium Tb 65
    Dysprosium Dy 66
    Holmium Ho 67
    Erbium Er 68
    Thulium Tm 69
    Ytterbium Yb 70
    Lutetium Lu 71
    Hafnium Hf 72
    Tantalum Ta 73
    Tungsten W 74
    Rhenium Re 75
    Osmium Os 76
    Iridium Ir 77
    Platinum Pt 78
    Gold Au 79
    Mercury Hg 80
    Thallium Tl 81
    Lead Pb 82
    Bismuth Bi 83
    Polonium Po 84
    Astatine At 85
    Radon Rn 86
    Francium Fr 87
    Radium Ra 88
    Actinium Ac 89
    Thorium Th 90
    Protactinium Pa 91
    Uranium U 92
    Neptunium Np 93
    Plutonium Pu 94
    Americium Am 95
    Curium Cm 96
    Berkelium Bk 97
    Californium Cf 98
    Einsteinium Es 99
    Fermium Fm 100
    Mendelevium Md 101
    Nobelium No 102
    Lawrencium Lr 103
    Rutherfordium Rf 104
    Dubnium Db 105
    Seaborgium Sg 106
    Bohrium Bh 107
    Hassium Hs 108
    Meitnerium Mt 109
    Darmstadtium Ds 110
    Roentgenium Rg 111
    Copernicium Cn 112
    Nihonium Nh 113
    Flerovium Fl 114
    Moscovium Mc 115
    Livermorium Lv 116
    Tennessine Ts 117
    Oganesson Og 118

    Atomic Weight- What Does It Mean? 


    Like protons are present in an atom, the atom’s nucleus also contains neutrons, which help keep the nucleus intact. Without any electrical charge, neutrons are slightly bigger than protons, and as they can break down, it is often considered a blend of proton and an electron. 

    As neutrons are heavier than protons, they could add weight to the atom as a whole. The atom’s weight is called the atomic weight, which equals the number of neutrons and protons. The stability and radioactivity of the atom depend highly on the neutron. 


    Therefore, these are some of the basics of atomic numbers. All the 118 elements and their atomic numbers have been given to understand what they are and their importance.