QUESTION 1 Using only an ordinary periodic table, place the following elements i

Question

QUESTION 1 Using only an ordinary periodic table, place the following elements in order according ot electronegativity trends. Pb, Po, TI, Cs (highest to lowest) B. Cs>Pb>TI>Po QUESTION 2 Arrange the following according to the general electronegativity trend, (highest to lowest Sr, Be, Ba, Ra Be > Ba> Sr> Ra Ra > Ba > Sr > Be Ra > Be> Sr> Ba Be >Sr> Ba > Ra QUESTION 3 Which of the following bonds are polar. Click all that apply. Use the table in yout text PH H-Cl H-H PCI

Explanation / Answer

1. Electronegativity for Cs is 0.7, Tl is 1.8, Pb is 1.9, Po is 2.0

Order is Po> Pb> Tl> Cs

2. Electronegativity for Be is 1.5, Ba is 0.9, Sr is 1.0, Ra is 0.9

Order is Be> Sr> Ba> Ra

In groups electrongegativity deceases.

3. a) P-H, H-Cl, P-Cl are polar

b) Symmetric molecules have dipole moment become zero.

So options are PCl3, PH3 have dipolemomet.

4. CH2Br2, CBr4 have dipole moment.

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