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

Show answers

Answers

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

link

the reduction process

link

an element's oxidation

link

an element's oxidation number increase

link

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

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.

Answer from: Quest

it’s previous models because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter

Another question on Chemistry

Chemistry, 22.06.2019 03:40

In an effort to address concerns about global warming, a power plant in portland,oregon is designed to take all of its exhaust gases from its boilers and recycle the co2 using the solvay process to make sodium hydrogen carbonate. the reaction is shown below. nh3(g) + h2o(l) + co2(g) + nacl(aq) → nahco3(aq) + nh4cl(aq) how many liters each of nh3 and co2 (both at stp) would be consumed to produce 3.00 kg of sodium bicarbonate? the volume of both nh3 and co2 would be

Answers: 1

Answer

Chemistry, 22.06.2019 08:30

What is a metal replacement reaction

Answers: 3

Answer

Chemistry, 22.06.2019 10:00

Why is carbon ideal for making different compounds?

Answers: 2

Answer

Chemistry, 22.06.2019 17:50

You exhale co2 which is produced during cellular respiration. co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid. the more physical activity you engage in, the more co2 your body is producing. you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw. can you see a change in the color of the indicator?

Answers: 2

Answer

You know the right answer?

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

Questions