Which of the following would you expect to have the lowest first ionization enem

Question

Which of the following would you expect to have the lowest first ionization enemy a. O b. I c. Li d. Rb 7. Which of the following would you expect to have the lowest electron affinity? a. Na b. P c. Ne d. Br Which of the following are isoelectronic with one another? a. K, K^+ b. O^^2, F^+ c. I^^-, Br^- d. Na, Mg In the photoclectron effect, a given metal must be irradiated with light of a minimum ____ ? ______ in order for an electron to be ejected from its surface. a. intensity b. frequency c. speed of 3 times 10^10 m/sec d. none of the above The ground-state electron configuration of oxygen is Is22s^^2p4. Therefore, oxygen is A) paramagnetic with four unpaired electrons. B) diamagnetic. C) paramagnetic with two unpaired electrons. D) diamagnetic with two unpaired electrons. E) paramagnetic with three unpaired electrons. The electron group geometry (arrangement of electron groups) for AICI_3 should he a. tetrahedral b. T-shaped c. trigonal planar d. trigonal pyramidal The molecular geometry of the HCN molecule should be _______. a. trigonal planar b. T-shaped c. bent d. linear For the NH_3 molecule, the H-N-H bond angle should be ____. a. 109.5* but

Explanation / Answer

6. d) Rb - alkali metals down the group having larger size have low ionisation energy

7. C) Ne - nobel gases have low electron affinity

8. B) O22- , F- both have 10 electron

9. B) frequency

10. C) paramagntic with two unpaired electron

11. C) trigonal geometry sp2 hybriisation hence trigonal planar geometry

12. D) linear

13. A) <109.5o C

14. B) Sp2

15. False CO2 is non-polar

16. B) 2, 1, -1, -1/2

17. e) 18 it is gven by 2n2 where n is the shell 2 (3)2 = 18

18. A) polar covallent

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