Chemistry, 30.01.2020 11:01 bussbhsvssu557

Which rule for assigning oxidation numbers is correct?
hydrogen is usually –1.
oxygen is usually –2
a pure group 1 element is +1
a monatomic ion is 0

Answers: 2

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Answer from: emily41950

Hydrogen is usually –1. This is INCORRECT. The oxidation number for H is +1.
Oxygen is usually –2. This is CORRECT.
A pure group 1 element is +1. This is INCORRECT. It does not follow. This will depend on the other elements and the overall charge.
A monatomic ion is 0. This is INCORRECT. Diatomic ion is 0.

Answer from: lalllda

Oxygen with an oxidation number -2 is the correct oxidation number

Further explanation

The formula for determining Oxidation Numbers in general:

1. The number of oxidation of single element atoms = 0. Examples of Ar, Mg, Cu, Fe, N₂, O₂, etc. = 0

Group IA (Li, Na, K, Rb, Cs, and Fr): +1

Group IIA (Be, Mg, Ca, Sr and Ba): +2

H in compound = +1, except metal hydride compounds (Hydrogen which binds IA or IIA groups) oxidation number H = -1, for example, LiH, MgH₂, etc.

2. Oxidation number O in compound = -2, except OF2 = + 2 and in peroxide (Na₂O₂, BaO₂) = -1 and superoxide, for example KO₂ = -1/2.3 The oxidation number in a non-filled compound = 0,

The total amount of oxidation in ion = ion charge, Example NO₃⁻ = -1

If we see the choice of answers

1. Hydrogen is usually –1.

This statement is wrong because generally the value of H is +1 except for the Hydride metal

2. Oxygen is usually –2

This statement is true, except the oxygen content of OF2, peroxide and superoxide compounds

3. A pure group 1 element is +1

In the form of a single or pure element, all the classes of oxidation are 0, so this statement is wrong

4. A monatomic ion is 0

Monoatomic ions consist of one ion atom is composed of several atoms called polyatomic ions

Monoatomic ion is dependent on the ion, such as H + oxidation +1, Ca2 + oxidation +2 etc. So this statement is wrong

Learn more

Assign an oxidation number to each element

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the reduction process

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an element's oxidation

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an element's oxidation number increase

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Keywords: monoatomic ion, element, The oxidation number

Which rule for assigning oxidation numbers is correct? hydrogen is usually –1. oxygen is usually –2

Answer from: Quest

The correct answer is b) false

Answer from: Quest

here are some of the ways in which chemical and nuclear reactions differ.

explanation:

$\begin{array}{ll}\qquad\textbf{chemical} & \qquad\textbf{nuclear} \\\text{energy changes $\approx 10^{2}$ kj} & \text{energy changes$\approx 10^{8}$ kj ($10^{6}$ times more}) \\\text{mass is conserved} & \text{mass changes to energy} \\\text{involves electrons} & \text{involves protons and neutrons} \\\text{atoms do not change} & \text{atoms transmute} \\\end{array}$

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Which rule for assigning oxidation numbers is correct?
hydrogen is usually –1.
oxygen i...

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