The periodic table of elements is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. The elements are presented in order of increasing atomic number, which corresponds to the number of protons in the nucleus of each atom.
The periodic table consists of 118 confirmed elements. Each element is represented by its symbol (one or two letters) and its atomic number, which indicates the number of protons in the nucleus. Here’s a summary of the periodic table:
Period 1:
- Hydrogen (H) – Atomic Number 1
- Helium (He) – Atomic Number 2
Period 2: 3. Lithium (Li) – Atomic Number 3
- Beryllium (Be) – Atomic Number 4
- Boron (B) – Atomic Number 5
- Carbon (C) – Atomic Number 6
- Nitrogen (N) – Atomic Number 7
- Oxygen (O) – Atomic Number 8
- Fluorine (F) – Atomic Number 9
- Neon (Ne) – Atomic Number 10
Period 3: 11. Sodium (Na) – Atomic Number 11
- Magnesium (Mg) – Atomic Number 12
- Aluminum (Al) – Atomic Number 13
- Silicon (Si) – Atomic Number 14
- Phosphorus (P) – Atomic Number 15
- Sulfur (S) – Atomic Number 16
- Chlorine (Cl) – Atomic Number 17
- Argon (Ar) – Atomic Number 18
Period 4: 19. Potassium (K) – Atomic Number 19
- Calcium (Ca) – Atomic Number 20
- Scandium (Sc) – Atomic Number 21
- Titanium (Ti) – Atomic Number 22
- Vanadium (V) – Atomic Number 23
- Chromium (Cr) – Atomic Number 24
- Manganese (Mn) – Atomic Number 25
- Iron (Fe) – Atomic Number 26
- Cobalt (Co) – Atomic Number 27
- Nickel (Ni) – Atomic Number 28
- Copper (Cu) – Atomic Number 29
- Zinc (Zn) – Atomic Number 30
- Gallium (Ga) – Atomic Number 31
- Germanium (Ge) – Atomic Number 32
- Arsenic (As) – Atomic Number 33
- Selenium (Se) – Atomic Number 34
- Bromine (Br) – Atomic Number 35
- Krypton (Kr) – Atomic Number 36
Period 5: 37. Rubidium (Rb) – Atomic Number 37
- Strontium (Sr) – Atomic Number 38
- Yttrium (Y) – Atomic Number 39
- Zirconium (Zr) – Atomic Number 40
- Niobium (Nb) – Atomic Number 41
- Molybdenum (Mo) – Atomic Number 42
- Technetium (Tc) – Atomic Number 43
- Ruthenium (Ru) – Atomic Number 44
- Rhodium (Rh) – Atomic Number 45
- Palladium (Pd) – Atomic Number 46
- Silver (Ag) – Atomic Number 47
- Cadmium (Cd) – Atomic Number 48
- Indium (In) – Atomic Number 49
- Tin (Sn) – Atomic Number 50
- Antimony (Sb) – Atomic Number 51
- Tellurium (Te) – Atomic Number 52
- Iodine (I) – Atomic Number 53
- Xenon (Xe) – Atomic Number 54
Period 6: 55. Cesium (Cs) – Atomic Number 55
- Barium (Ba) – Atomic Number 56
- Lanthanum (La) – Atomic Number 57
- Cerium (Ce) – Atomic Number 58
- Praseodymium (Pr) – Atomic Number 59
- Neodymium (Nd) – Atomic Number 60
- Promethium (Pm) – Atomic Number 61
- Samarium (Sm) – Atomic Number 62
- Europium (Eu) – Atomic Number 63
- Gadolinium (Gd) – Atomic Number 64
- Terbium (Tb) – Atomic Number 65
- Dysprosium (Dy) – Atomic Number 66
- Holmium (Ho) – Atomic Number 67
- Erbium (Er) – Atomic Number 68
- Thulium (Tm) – Atomic Number 69
- Ytterbium (Yb) – Atomic Number 70
- Lutetium (Lu) – Atomic Number 71
Period 7: 72. Hafnium (Hf) – Atomic Number 72
- Tantalum (Ta) – Atomic Number 73
- Tungsten (W) – Atomic Number 74
- Rhenium (Re) – Atomic Number 75
- Osmium (Os) – Atomic Number 76
- Iridium (Ir) – Atomic Number 77
- Platinum (Pt) – Atomic Number 78
- Gold (Au) – Atomic Number 79
- Mercury (Hg) – Atomic Number 80
- Thallium (Tl) – Atomic Number 81
- Lead (Pb) – Atomic Number 82
- Bismuth (Bi) – Atomic Number 83
- Polonium (Po) – Atomic Number 84
- Astatine (At) – Atomic Number 85
- Radon (Rn) – Atomic Number 86
Period 8: 87. Francium (Fr) – Atomic Number 87
- Radium (Ra) – Atomic Number 88
- Actinium (Ac) – Atomic Number 89
- Thorium (Th) – Atomic Number 90
- Protactinium (Pa) – Atomic Number 91
- Uranium (U) – Atomic Number 92
- Neptunium (Np) – Atomic Number 93
- Plutonium (Pu) – Atomic Number 94
- Americium (Am) – Atomic Number 95
- Curium (Cm) – Atomic Number 96
- Berkelium (Bk) – Atomic Number 97
- Californium (Cf) – Atomic Number 98
- Einsteinium (Es) – Atomic Number 99
- Fermium (Fm) – Atomic Number 100
- Mendelevium (Md) – Atomic Number 101
