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Oxidation Numbers Overview

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Questions and Answers

What is the oxidation state of the iron ion Fe3+?

+3 (correct)

Which ion has an oxidation state of -2?

O+

Fe3+

O2- (correct)

Fe2+

What does the oxidation number represent?

The atomic number of an atom

The total number of electrons gained or lost by an atom in a bond (correct)

The number of protons in an atom

The mass of an atom

Why is it important to assign oxidation numbers in chemical reactions?

To identify the valency of a compound (A) Signup and view all the answers

What does a positive oxidation number indicate?

The atom has lost electrons (C) Signup and view all the answers

How do oxidation numbers help in balancing chemical equations?

By looking at changes in the oxidation numbers of the atoms in each compound (C) Signup and view all the answers

What is the purpose of systematic nomenclature of chemical compounds?

To help name compounds based on their oxidation numbers (B) Signup and view all the answers

What is the oxidation number of sulfur in S8?

0 (A) Signup and view all the answers

In the compound UF6, what is the oxidation number of uranium?

+6 (B) Signup and view all the answers

What is the oxidation number of fluorine in uranium hexafluoride (UF6)?

-1 (D) Signup and view all the answers

Which statement about the oxidation state of hydrogen is correct?

Hydrogen's oxidation number varies depending on the compound. (B) Signup and view all the answers

What is the oxidation state of chlorine in the chlorate ion (ClO3-)?

+5 (D) Signup and view all the answers

When assigning oxidation numbers, what does the sum of all oxidation states in a neutral compound equal to?

0 (D) Signup and view all the answers

If sulfur is oxidized in a reaction from -2 to 0, what is its change in oxidation number?

+2 (A) Signup and view all the answers

In a redox reaction, which element typically has a -1 oxidation state when found in a molecule?

Fluorine (B) Signup and view all the answers