Question

1? edili u Creuil 19. How many electrons can be described by the quantum numbers 1-2,7-2, a) 0 b) 2 c) 6 d) 10 e) 14 20. In which group do all the elements have the same number of valence electrons? a) P, S, CI b) Ag, Cd, Ar c) Na, Ca, Ba d) P, As, Se e) none of these 21. List the following atoms in order of increasing ionization energy: Li, Na, C, O, F. a) Li<Na <C<O<F b) Na <Li<C<O<F c) F<O<C<Li<Na d) Na <Li<F<O<C e) Na <Li<C<FO 22. Atoms with greatly different electronegativity values are expected to form a) no bonds b) covalent bonds c) triple bonds d) ionic bonds e) none of these 23. Which of the following has the smallest radius? Br b) S- c) Xe d) Ca2+ Kr 24. Which of the following arrangements is in order of increasing size? a) Gal > Ca? > K > CI > SP- b) S-> C > K > Ca? > Ga c) Gal > S-> Ca? > C > K* d) Gal > Cat > S-> C > K e) Galt > Cat > S-> K+ > CH 25. The hybridization of the nitrogen atom in the cation NH is: a) sp b) sp dsp d) sp none of these c)

Answer 1

electrons can be described by the quantum numbers n-2,1-2, m-1? 19.He 0- bi 2 cl 6 10 14 20. In which group do all the elements have the same number of valence electrons? al P, S, CI Ag. Cd, Ar Na, Ca, Ba P, As, Se none of these di 21. List the following atoms in order of increasing ionization energy: Li, Na, C, O, F. Li <Na <C<O<F Na < Li <CO<F F<O<C<Li <Na c) d) Na < Li<F O<c Na < Li<C<F<O e) 22. Atoms with greatly different electronegativity values are expected to form no bonds b) a) covalent bonds triple bonds ionic bonds none of these e) 23. Which of the following has the smallest radius? a) b) Xe Ca2 Kr Br S2 cl e) 24. Which of the following arrangements is in order of increasing size? Ga> Ca> K> Cl> S2- S-> C> K> Ca> Ga" Ga> S2->Ca2> Cl> K Ga>Ca> S2-> Cl> K a D d) e) Ga> Ca> S2->K*> Cl 25. The hybridization of the nitrogen atom in the cation NH; is: sp a sp b' dsp c) d) sp none of these e)