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I am having trouble with the following chemistry questions, please advise :)  1. How many valence electrons are there in the ion, MnO4- ? A. 24 B. 32 C. 30 D. 28 E. 31

I am having trouble with the following chemistry questions, please advise :)  1. How many valence electrons are there in the ion, MnO4- ? A. 24 B. 32 C. 30 D. 28 E. 31

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter3: Atomic Shells And Classical Models Of Chemical Bonding
Section: Chapter Questions
Problem 86AP
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I am having trouble with the following chemistry questions, please advise :) 

1. How many valence electrons are there in the ion, MnO4- ?

A. 24

B. 32

C. 30

D. 28

E. 31

2. Which of the following ranks the atoms in order of decreasing electronegativity?


A. Cl, O, Te, Mo, Rb
B. O, Cl, Mo, Rb, Te
C. Cl, O, Mo, Rb, Te
D. Rb, Mo, Te, Cl, O
E. O, Cl, Te, Mo, Rb

 

3. How would one classify a silicon crystal doped with indium?

A. conductor

B. n-type semiconductor

C. p-type semiconductor

D. insulator

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