Use the References to access important values if needed for this question. 1A 8A H2A 3A 4A 5A 6A 7A He Li Be B CN OF NE Na Mg 38 48 58 68 7B8B 1B 2B Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Ha Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Considering only ions with charges of +1, +2, -1 and -2, or neutral atoms, give the symbols for 4 species that are isoelectronic with the sodium ion, Na*.

SA 4A SA 6A 7A He BCN OF Ne 18 20 Al Si P S Cl Ar Li Be Na Mg 38 48 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Rc Rf Ha Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Bk Cf Es Fm Md No Lr Write the complete electron configuration for the cobalt atom. Using NOBLE GAS notation write the electron configuration for the titanium atom. 00

K H 2A Li Be Na Mg 3B 4B 5B 6B 7B8B K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga 3A 4A 5A 6A 7A He F Ne Cl Ar BCN0 Si P Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In * Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Fr Ra Ac Rf Ha ** silicon, phosphorus, aluminum, sulfur 18 2B Al smallest largest 8A S Ge As Se Br Kr Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Sn Sb Te I Xe Arrange the following elements in order of increasing electronegativity: Pb Bi Po At Rn Please answer this question according to the general rules you have learned regarding periodic trends. DO NOT base your answer on tabulated values since exceptions may occur.

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