Chem,1411 Study Guide Exam 2 2018 Spring - Compatibility Mode es Mailings Review

Question

Chem,1411 Study Guide Exam 2 2018 Spring - Compatibility Mode es Mailings Review View Help 9 Tell me what you want to do T AaBbCcDd AaBbCcDd AaBbC AaBbCc AaB AaBbCcD AaBb Normal 1No Spac.. Heading 1 Heading 2 Title Subtitle Subtle Paragraph Styles 25. Which statement is false? A) For any atom, the 4s orbital lies lower in energy than the 5s orbital. B) For a hydrogen atom, a 4s orbital, a 4p orbital, and a 4d orbital all have the same energy. C) The 4s orbital lies lower in energy than the 3d orbital for atoms K, Ca, Sc, and T D) The 4s orbital lies lower in energy than the 3d orbital for Cu and Fe2+ 26. The symbol [Kr) represents A) 4324p6 ?) 1s22s22p63s23p64s24p6 C) 1s22s22p6323p63d104524p6 D) 1522822p63823p63d104824p64d10 27. Of the following, which atom has the smallest atomic radius? A) Mg B) S C) Sr 28. Which ion has the smallest ionic radius? A) Lit B) Nat C) K+ 29. Of the following, which element has the highest first ionization energy? A) Ca B) K C) LiD) Mg

Explanation / Answer

25) Answer is option D

26) Answer is option C

27) Answer is option B (sulphur). Here we should know, in periodic table of elements the size of the atom increases in groups i.e. from top to bottom. Where as size decreases in periods i.e. from left to right.

28) Answer is option A, Li1+

The ionization energy, energy required to take out an electron from orbit. As the electron nearer to nucleus requires more energy to remove. The element which has smallest size requires more energy to remove an electron from orbit. Here Li is the smallest atom so its first ionization energy is more.

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