A nonpolar bond will form between two _____ atoms of _____ electronegativity. A)

Question

A nonpolar bond will form between two _____ atoms of _____ electronegativity. A) different, different B) similar, different C) identical, different D) identical, equal E) different, opposite Which element would be expected to have chemical and physical properties closest to those of selenium? A) Cu B) S C) Si D) Fe E) Ne At maximum, an p-subshell can hold _____ electrons. A) 6 B) 10 C) 4 D) 8 E) 2 Of the following atoms, which has the largest first ionization energy? A) Sr B) Rb C) Ca D) Ba E) K The largest principal quantum number in the ground state electron configuration of cobalt is _____. A) 9 B) 2 C) 4 D) 7 E) 3 There are _____ covalent bonds in the Lewis structure of CH_3 CH_2 OH. A) 9 B) 7 C) 6 D) 8 E) 10 The electron configuration [Kr]4d^5 represents _____. A) Tc^+ B) Mo^+ C) Tc D) Mo^2+ E) Rb^+ In which orbital does an electron in a cesium atom experience the greatest effective nuclear charge? A) 4p B) 5s C) 6s D) 5p E) 1s Screening of the nuclear charge by core electrons in atoms is _____. A) more efficient than that by valence electrons B) responsible for a general decrease in atomic radius going down a group C) less efficient than that by valence electrons D) essentially identical to that by valence electrons E) both essentially identical to that by valence electrons and responsible for a general atomic radius going down a group ions are represented by the electron configuration _____. A) [Ar]3d^10 B) [Kr]4d^8 C) [Ar]4s^2 3d^6

Explanation / Answer

21.D

Cl -Cl it is non polar covalent bond

22. B

VIA group elements O,S,Se,Te,Po

23. A

no of electrons in any subshell = 2(2l+1)  

for P orbital l= 1                         = 2(2*1 + 1) = 6

24.C

in a group top to bottom ionisation potential value is decreases

Be

Mg

Ca

Sr

Ba

25. E

Co = 27    [Ar]4s23d7

n = 3

26. D

CH3-CH2-OH 8 covalent bonds

27. B

M0 = 42 [Kr}5s14d5

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