Give the three examples of elements?

Answer 1

Some examples of elements is iron(Fe), Hydrogen (H) and Sulfur(S).
Elements presents in Periodic Table like hydrogen , helium , lithium , beryllium , boron ,carbon , nitrogen , oxygen etc called elements
An element is a substance that can not be broken down into any other chemically distinct substance. Examples would be sulfur, oxygen, nitrogen, gold, and lead.

Answer 2

No.

Atomic

WeightNameSym.M.P.

( °C ) B.P.

( °C )Density*

(g/cm3)Earth

crust (%)*Discovery

(Year)Group*Electron

configurationIonization

energy (eV)11.0079HydrogenH-259-2530.090.14177611s113.598424.0026HeliumHe-272-2690.181895181s224.587436.941LithiumLi18013470.5318171[He] 2s15.391749.0122BerylliumBe127829701.8517972[He] 2s29.3227510.811BoronB230025502.34180813[He] 2s2 2p18.298612.0107CarbonC350048272.260.094ancient14[He] 2s2 2p211.2603714.0067NitrogenN-210-1961.25177215[He] 2s2 2p314.5341815.9994OxygenO-218-1831.4346.71177416[He] 2s2 2p413.6181918.9984FluorineF-220-1881.70.029188617[He] 2s2 2p517.42281020.1797NeonNe-249-2460.9189818[He] 2s2 2p621.56451122.9897SodiumNa988830.972.7518071[Ne] 3s15.13911224.305MagnesiumMg63910901.742.0817552[Ne] 3s27.64621326.9815AluminumAl66024672.78.07182513[Ne] 3s2 3p15.98581428.0855SiliconSi141023552.3327.69182414[Ne] 3s2 3p28.15171530.9738PhosphorusP442801.820.13166915[Ne] 3s2 3p310.48671632.065SulfurS1134452.070.052ancient16[Ne] 3s2 3p410.361735.453ChlorineCl-101-353.210.045177417[Ne] 3s2 3p512.96761839.948ArgonAr-189-1861.78189418[Ne] 3s2 3p615.75961939.0983PotassiumK647740.862.5818071[Ar] 4s14.34072040.078CalciumCa83914841.553.6518082[Ar] 4s26.11322144.9559ScandiumSc153928322.9918793[Ar] 3d1 4s26.56152247.867TitaniumTi166032874.540.6217914[Ar] 3d2 4s26.82812350.9415VanadiumV189033806.1118305[Ar] 3d3 4s26.74622451.9961ChromiumCr185726727.190.03517976[Ar] 3d5 4s16.76652554.938ManganeseMn124519627.430.0917747[Ar] 3d5 4s27.4342655.845IronFe153527507.875.05ancient8[Ar] 3d6 4s27.90242758.9332CobaltCo149528708.917359[Ar] 3d7 4s27.8812858.6934NickelNi145327328.90.019175110[Ar] 3d8 4s27.63982963.546CopperCu108325678.96ancient11[Ar] 3d10 4s17.72643065.39ZincZn4209077.13ancient12[Ar] 3d10 4s29.39423169.723GalliumGa3024035.91187513[Ar] 3d10 4s2 4p15.99933272.64GermaniumGe93728305.32188614[Ar] 3d10 4s2 4p27.89943374.9216ArsenicAs816135.72ancient15[Ar] 3d10 4s2 4p39.78863478.96SeleniumSe2176854.79181716[Ar] 3d10 4s2 4p49.75243579.904BromineBr-7593.12182617[Ar] 3d10 4s2 4p511.81383683.8KryptonKr-157-1533.75189818[Ar] 3d10 4s2 4p613.99963785.4678RubidiumRb396881.6318611[Kr] 5s14.17713887.62StrontiumSr76913842.5417902[Kr] 5s25.69493988.9059YttriumY152333374.4717943[Kr] 4d1 5s26.21734091.224ZirconiumZr185243776.510.02517894[Kr] 4d2 5s26.63394192.9064NiobiumNb246849278.5718015[Kr] 4d4 5s16.75894295.94MolybdenumMo2617461210.2217816[Kr] 4d5 5s17.092443*98TechnetiumTc2200487711.519377[Kr] 4d5 5s27.2844101.07RutheniumRu2250390012.3718448[Kr] 4d7 5s17.360545102.9055RhodiumRh1966372712.4118039[Kr] 4d8 5s17.458946106.42PalladiumPd1552292712.02180310[Kr] 4d108.336947107.8682SilverAg962221210.5ancient11[Kr] 4d10 5s17.576248112.411CadmiumCd3217658.65181712[Kr] 4d10 5s28.993849114.818IndiumIn15720007.31186313[Kr] 4d10 5s2 5p15.786450118.71TinSn23222707.31ancient14[Kr] 4d10 5s2 5p27.343951121.76AntimonySb63017506.68ancient15[Kr] 4d10 5s2 5p38.608452127.6TelluriumTe4499906.24178316[Kr] 4d10 5s2 5p49.009653126.9045IodineI1141844.93181117[Kr] 4d10 5s2 5p510.451354131.293XenonXe-112-1085.9189818[Kr] 4d10 5s2 5p612.129855132.9055CesiumCs296781.8718601[Xe] 6s13.893956137.327BariumBa72511403.590.0518082[Xe] 6s25.211757138.9055LanthanumLa92034696.1518393[Xe] 5d1 6s25.576958140.116CeriumCe79532576.771803101[Xe] 4f1 5d1 6s25.538759140.9077PraseodymiumPr93531276.771885101[Xe] 4f3 6s25.47360144.24NeodymiumNd101031277.011885101[Xe] 4f4 6s25.52561*145PromethiumPm110030007.31945101[Xe] 4f5 6s25.58262150.36SamariumSm107219007.521879101[Xe] 4f6 6s25.643763151.964EuropiumEu82215975.241901101[Xe] 4f7 6s25.670464157.25GadoliniumGd131132337.91880101[Xe] 4f7 5d1 6s26.150165158.9253TerbiumTb136030418.231843101[Xe] 4f9 6s25.863866162.5DysprosiumDy141225628.551886101[Xe] 4f10 6s25.938967164.9303HolmiumHo147027208.81867101[Xe] 4f11 6s26.021568167.259ErbiumEr152225109.071842101[Xe] 4f12 6s26.107769168.9342ThuliumTm154517279.321879101[Xe] 4f13 6s26.184370173.04YtterbiumYb82414666.91878101[Xe] 4f14 6s26.254271174.967LutetiumLu165633159.841907101[Xe] 4f14 5d1 6s25.425972178.49HafniumHf2150540013.3119234[Xe] 4f14 5d2 6s26.825173180.9479TantalumTa2996542516.6518025[Xe] 4f14 5d3 6s27.549674183.84TungstenW3410566019.3517836[Xe] 4f14 5d4 6s27.86475186.207RheniumRe3180562721.0419257[Xe] 4f14 5d5 6s27.833576190.23OsmiumOs3045502722.618038[Xe] 4f14 5d6 6s28.438277192.217IridiumIr2410452722.418039[Xe] 4f14 5d7 6s28.96778195.078PlatinumPt1772382721.45173510[Xe] 4f14 5d9 6s18.958779196.9665GoldAu1064280719.32ancient11[Xe] 4f14 5d10 6s19.225580200.59MercuryHg-3935713.55ancient12[Xe] 4f14 5d10 6s210.437581204.3833ThalliumTl303145711.85186113[Xe] 4f14 5d10 6s2 6p16.108282207.2LeadPb327174011.35ancient14[Xe] 4f14 5d10 6s2 6p27.416783208.9804BismuthBi27115609.75ancient15[Xe] 4f14 5d10 6s2 6p37.285684*209PoloniumPo2549629.3189816[Xe] 4f14 5d10 6s2 6p48.41785*210AstatineAt302337194017[Xe] 4f14 5d10 6s2 6p59.386*222RadonRn-71-629.73190018[Xe] 4f14 5d10 6s2 6p610.748587*223FranciumFr2767719391[Rn] 7s14.072788*226RadiumRa70017375.518982[Rn] 7s25.278489*227ActiniumAc1050320010.0718993[Rn] 6d1 7s25.1790232.0381ThoriumTh1750479011.721829102[Rn] 6d2 7s26.306791231.0359ProtactiniumPa156815.41913102[Rn] 5f2 6d1 7s25.8992238.0289UraniumU1132381818.951789102[Rn] 5f3 6d1 7s26.194193*237NeptuniumNp640390220.21940102[Rn] 5f4 6d1 7s26.265794*244PlutoniumPu640323519.841940102[Rn] 5f6 7s26.026295*243AmericiumAm994260713.671944102[Rn] 5f7 7s25.973896*247CuriumCm134013.519441025.991597*247BerkeliumBk98614.7819491026.197998*251CaliforniumCf90015.119501026.281799*252EinsteiniumEs86019521026.42100*257FermiumFm152719521026.5101*258MendeleviumMd19551026.58102*259NobeliumNo82719581026.65103*262LawrenciumLr162719611024.9104*261RutherfordiumRf19644105*262DubniumDb19675106*266SeaborgiumSg19746107*264BohriumBh19817108*277HassiumHs19848109*268MeitneriumMt19829

Answer 3

As of 2017, there are 119 known elements:

1. Actinium
   
2. Aluminum
   
3. Americium
   
4. Antimony
   
5. Argon
   
6. Arsenic
   
7. Astatine
   
8. Barium
   
9. Berkelium
   
10. Beryllium
    
11. Bismuth
    
12. Bohrium
    
13. Boron
    
14. Bromine
    
15. Cadmium
    
16. Calcium
    
17. Californium
    
18. Carbon
    
19. Cerium
    
20. Cesium
    
21. Chlorine
    
22. Chromium
    
23. Cobalt
    
24. Copper
    
25. Curium
    
26. Darmstadtium
    
27. Dubnium
    
28. Dysprosium
    
29. Einsteinium
    
30. Erbium
    
31. Europium
    
32. Fermium
    
33. Fluorine
    
34. Francium
    
35. Gadolinium
    
36. Gallium
    
37. Germanium
    
38. Gold
    
39. Hafnium
    
40. Hassium
    
41. Helium
    
42. Holmium
    
43. Hydrogen
    
44. Indium
    
45. Iodine
    
46. Iridium
    
47. Iron
    
48. Krypton
    
49. Lanthanum
    
50. Lawrencium
    
51. Lead
    
52. Lithium
    
53. Lutetium
    
54. Magnesium
    
55. Manganese
    
56. Meitnerium
    
57. Mendelevium
    
58. Mercury
    
59. Molybdenum
    
60. Neodymium
    
61. Neon
    
62. Neptunium
    
63. Nickel
    
64. Niobium
    
65. Nitrogen
    
66. Nobelium
    
67. Osmium
    
68. Oxygen
    
69. Palladium
    
70. Phosphorus
    
71. Platinum
    
72. Plutonium
    
73. Polonium
    
74. Potassium
    
75. Praseodymium
    
76. Promethium
    
77. Protactinium
    
78. Radium
    
79. Radon
    
80. Rhenium
    
81. Rhodium
    
82. Roentgenium
    
83. Rubidium
    
84. Ruthenium
    
85. Rutherfordium
    
86. Samarium
    
87. Scandium
    
88. Seaborgium
    
89. Selenium
    
90. Silicon
    
91. Silver
    
92. Sodium
    
93. Strontium
    
94. Sulfur
    
95. Tantalum
    
96. Technetium
    
97. Tellurium
    
98. Terbium
    
99. Thallium
    
100. Thorium
     
101. Thulium
     
102. Tin
     
103. Titanium
     
104. Tungsten
     
105. Ununbium
     
106. Ununhexium
     
107. Ununoctium
     
108. Ununpentium
     
109. Ununquadium
     
110. Ununseptium
     
111. Ununtrium
     
112. Ununium
     
113. Uranium
     
114. Vanadium
     
115. Xenon
     
116. Ytterbium
     
117. Yttrium
     
118. Zinc
     
119. Zirconium
     

Answer 4

iron, coper, silver, gold, hydrogen, carbon, oxygen, nitrogen

Answer 5

The doppler effect, The Kinetic & Potential Energy (:

Answer 6

See the link and choose for yourself! ;)