Group exit: 2 wad: s Common Properties: * Two negatrons in the outer shell * Low electron affinities * Low electronegativities * Readily product line divalent cations. Discovery Dates: beryllium: unaffectionate in 1828 by Wöhler Magnesium: accepted as an element in 1775, stray in handsome form by Davy in 1805 Calcium: stranded in 1808 by Davy Strontium: isolated in 1808 by Davy barium: isolated in 1808 by Davy Radium: discovered and isolated in 1911 by Marie Curie. ionization energy number - atomic number 1 /kJ mol-1 1st 589.8 2nd 1145.4 3rd 4912.4 4th 6491 5th 8153 sixth 10496 7th 12270 8th 14206 9th 18191 ten percent 20385 11th 57110 12th 63410 thirteenth 70110 14th 78890 15th 86310 ordinal 94000 17th 104900 18th 111710 nineteenth 494850 20th 527760 nuclear arrive: 20 nuclear Radii: atomic wheel spoke (empirical): 180 pm nuclear radius (calculated): 194 pm negatron chemical attraction: 2.37 kJ mol-1 negativeness Value in Pauling units Pauling negativeness 1.00 Sanderson electronegativity 0.95 Allred Rochow electronegativity 1.04 Mulliken-Jaffe electronegativity 1.08 (sp orbital) Allen electronegativity 1.
034 Lewis electron Dot Diagram: Ca valence Shell electron configuration: 1s22s22p63s23p64s2 Noble Gas contraction: [Ar] 4s2 Metallic Character: * Grey, smooth metal * Rather hard * Rather reactive * It readily forms a white name and address of calcium nitride in air * It reacts with piddle and the metal burns with a yellow-red flame atomic Number: 12 Atomic radius (empirical): 150 pm Atomic radius (calculated): 145 pm Electron Affinity: 0 kJ mol-1 negativism Value in Pauling units Pauling electronegativity 1.31 Sanderson electronegativity 1.32 Allred Rochow electronegativity 1.23 Mulliken-Jaffe electronegativity 1.37 (sp orbital) Allen electronegativity...If you want to get a full essay, order it on our website:
Ordercustompaper.comIf you want to get a full essay, wisit our page: write my paper
No comments:
Post a Comment