What is the ground-state electron configuration of Mn? [Ar] 3d^s [Ar] 4s^13d^s [
ID: 1067252 • Letter: W
Question
What is the ground-state electron configuration of Mn? [Ar] 3d^s [Ar] 4s^13d^s [Ar] 4s^13d^s [Ar] 4s^24p^2 Of the following, which atom has the smallest atomic radius? Mg Cl Ca F What atom has exactly three electrons in the 5d sublevel V Nb Sb Ta Which of the following has the largest radius? K^+ Cl^- Ca^1+ F S^2- Which of the following ionic compounds has the largest lattice energy (i, e, ., the lattice energy most favorable to a stable lattice)? BaO NaCl MgO NaBr Krypton belongs to the group of the periodic table. alkaline earth metal halogen alkali metal noble gas What is the mass of aluminum oxide (101.96 g/mol) produced from 3.59 g of iron(ll) oxide (71.85 g/mol)? 3 FeO_(l) + 2 Al_(l) Delta rightarrow 3 Fe_(l) + AI2O3_(r) 5.10 g 7.58 g 0.842 g J 70g 15.3 g Ethyl alcohol has a density less than water (d = 0.789 g/ml.). What is the volume of 35.5 g of ethyl alcohol? 28.0 mL 45.0 ml. 280 mL 2.80 ml. 4.50 ml. Which one of the folio wins compounds is soluble in water?^Ag3PO_4 CuS PbCl_2 ZnCl_2Explanation / Answer
8) [Ar] 3d54s2
atomic number of Mn = 25
1s22s22p63s23p63d54s2
9) Mg = 12 atomic no.
Cl = 17
Ca = 20
F = 9
smallest atomic redius of F
10) V = [Ar] 3d3 4s2 atomc no. 23
Nb =[Kr] 4d4 5s1 ..atomic no. 41
Sb =[Kr] 4d10 5s2 5p3 .. atomic no. 51
Ta = [Xe] 4f14 5d3 6s2 atomic no. 73
answer is Ta
11) K+ = atomic no. 19 ( no. of electrone = 18 )
Cl- = atomic no 17 (no. of electron = 18)
Ca2+ = atomic no. 20 (no.of electron 18)
S2- = atomic no 16 ( no. of electron = 18)
answer is S2-
12) MgO (+2 and -2 ions with small radius)
13) group 18 element so noble gas
14) 3 mole of FeO produce 1 mole of Al2O3
moles of FeO = 0.05
moles of Al2O3 = 0.0166
mass of Al2O3 = 1.7 g
15) volume = mass / density
volume = 45.ml
16)ZnCl2
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