Sutcliff HWk 3 Answers - huynh (hph268) Homework 3...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: huynh (hph268) Homework 3 Sutcliffe (52380) 1 This print-out should have 20 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Generally speaking, in the periodic table, elec- tronegativity (decreases, increases) in going from left to right and (decreases, increases) in going from bottom to top. 1. increases; increases correct 2. decreases; increases 3. decreases; decreases 4. increases; decreases Explanation: As the elements become less metallic their electronegativities increase. 002 10.0 points All of the following can have the ground-state electron configuration [Xe] 4 f 14 5 d 10 except 1. Au + 2. Bi 5+ 3. Pb 4+ 4. Tl + correct 5. Hg 2+ Explanation: Write the electron configurations for the ions listed to see which one matches the outer electron configuration given. The Aufbau or- der of electron filling is 1 s , 2 s , 2 p , 3 s , 3 p , 4 s , 3 d , 4 p , 5 s , 4 d , 5 p , 6 s , 4 f , 5 d , 6 p , etc . s orbitals can hold 2 electrons, p orbitals 6 electrons, and d orbitals 10 electrons. Note some exceptions do occur in the electron con- figuration of atoms (and ions) because of the stability of either a full or half-full outermost d-orbital, so you may need to account for this by shuffling an electron from the ( n- 1) s orbital. When electrons are removed from or- bitals in a neutral atom to create a positive ion they are taken in this order: outermost (highest value of n ) p , outermost s , then out- ermost d . 003 10.0 points Arrange the following ions in order of increas- ing radius: K + , Li + , Be 2+ , Na + . 1. Na + < K + < Be 2+ < Li + 2. Be 2+ < Li + < Na + < K + correct 3. Li + < Na + < K + < Be 2+ 4. K + < Be 2+ < Li + < Na + Explanation: Ionic radius decreases with atomic number in a given set of isoelectronic species, thus Be 2+ is smaller than Li + . Ionic radius in- creases down a given family on the periodic table, thus Li + is smaller than Na + , which is in turn smaller than K + . 004 10.0 points F- is bigger than F because 1. F- has one less electron so there is less effective shielding of the nuclear charge. 2. F- has one more electron which causes less electron repulsions in the outer orbitals, thus expanding the electron cloud. 3. F- has one more electron so there is less effective shielding of the nuclear charge. 4. F- has one less electron so there is more effective shielding of the nuclear charge....
View Full Document

Page1 / 7

Sutcliff HWk 3 Answers - huynh (hph268) Homework 3...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online