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🔥🔥IMPORTANT FACTS TO REMEMBER 🔥🔥 🌼Lowest electronegativity : Cs 💐. Highest electronegativity : F.               🌷 Highest ionisation potential : He 🌹. Lowest ionisation potential : Cs 🌺. Lowest electron affinity : Noble gases 🌸. Highest electron affinity : Chlorine 🌻. Least electropositive element : F 🌞. Lowest m. pt. metal : Hg 🌸 Highest m. pt. and b. pt. metal : W (Tungsten) 🥀. Lowest m. pt. and b. pt. non metal : He 🍁 Notorious element : Hydrogen 🐚. Lightest element : Hydrogen 🌾. Smallest atomic size : H 🐲. Largest atomic size : Cs 🐿. Largest anionic size : I – 🦜. Smallest cation : H+ 🌵. Most electropositive element : Cs ☘. Element with electronegativity next to Fluorine : Oxygen 🍄. Group containing maximum no. of gaseous elements in periodic table : Zero group ⭐️. Total number of gaseous elements in periodic table : 11 (H, N, O, F, Cl, He, Ne, Ar, Kr, Xe, Rn) 🌈. Total number of liquid elements in periodic table : 6 (Ga, Br, Cs, Hg, Fr, Uub) 🌽. Smallest anion : H– 🥎. Liquid element of radioactive nature : Fr 🏹 Total number of radioactive elements in periodic table : 25 🏋‍♂ Volatile d-block elements : Zn, Cd, Hg, Uub 🏵. Element containing no neutron : H 🎺. Most aboundant element on earth : Oxygen 🧩. Rarest element on earth : At (astatine) 🚌. Most aboundant metal on earth : Al 🚦. Element having maximum tendency for catenation : Carbon ⛺️. Non metal having highest m. pt., b. pt. : Carbon (diamond) 🏥. Metals showing highest oxidation number : Os (+8) 🌆. Most electrovalent compound : CsF 📱. Most stable carbonate : Cs2CO3 ⏰. Strongest alkali : CsOH ⚙. Strongest basic oxide : Cs2O 💣. Best electricity conductor among metals : Ag 🧬. Best electricity conductor among non metals : graphite 🖼. Most poisonous element : Pu (Plutonium) 🪅. Liquid non metals : Br      📕. Element kept in water : Phosphorous 🖇. Elements kept in kerosene : IA group element (except Li) ❤️. Elements sublime on heating : I 2 💢. Noble metals : Au, Pt. etc. ♨️. Amphoteric metal : Be, Zn, Al, Sn, Pb 🔰. Amphoteric non metal : Si 💠. Metalloids elements : B, Si, As, Te, At, Ge, Sb ❇️. Non metals having metallic lusture : Graphite, Iodine 🔆. Heaviest naturally occuring element : Uranium ‼️. Poorest conductor of electricity : Diamond 🟡. Hardest naturally occuring element : Diamond 🔳. Lightest solid metal : Li 🔶. Amphoteric oxides : BeO, Al2O3 , ZnO, PbO, PbO2 , SnO, SnO2 , Sb2O3 , As3O3 etc. 🟪. Neutral oxides of non metals : NO, CO, H2O, N2O ♦️. Dry bleacher : H2O2 🦀. Dry ice : Solid CO2 🦄. First man made element : Tc43 (Technicium) 🦋. Smallest period : Ist (2 elements) 🎄. Largest period in periodic table : 6th (32 elements) 🎋. Largest group in periodic table : IIIB (32 elements) 💐. Most abundant d-block metal : Fe 🌷. Most abundant s-block metal : Ca 🌹. Highest density (Metals) : Os, Ir 🌸. Highest density (Non Metals) : Boron 🌼. Most abundant gas in atmosphere : Nitrogen 🌝. Most abundant element in the universe : Hydrogen