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3 years ago

An isotope has more or less ____________________________ in the nucleus.

Chemistry

1 answer:

Serggg [28]3 years ago

5 0

Answer:

Neutrons

Explanation:

An isotope has more or less number of neutrons in the nucleus.

The nucleus of an atom is made up of two fundamental particles, the protons and the neutrons. Protons are positively charged particles in an atom. Neutrons do not carry any charges whatsoever.

Isotopy is the existence of two or more atoms of the same element having the same atomic number but different mass numbers due to the differences in the number of neutrons.
Isotopes differ in masses due to the number of neutrons they contain.
Therefore, they show similar chemical properties.

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Using the following portion of the activity series for oxidation half-reactions, determine which combination of reactants will r

dusya [7]

The question is incomplete, the complete question is:

Using the following portion of the activity series for oxidation half-reactions, determine which combination of reactants will result in a reaction.

$Li(s)\rightarrow Li^+(aq)+e^-$

$Al(s)\rightarrow Al^{3+}(aq)+3e^-$

A) Li(s) with Al(s)

B) Li(s) with $Al^{3+}$ (aq)

C) $Li^+$ (aq) with Al(s)

D) $Li^+$ (aq) with $Al^{3+}$ (aq)

Answer: The correct option is B): Li(s) with $Al^{3+}$ (aq)

Explanation:

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction.

The chemical species will undergo a reduction reaction if the value of standard reduction potential is more positive or less negative.

For the given half-reactions:

$Li(s)\rightarrow Li^+(aq)+e^-;E^o_{Li^+/Li}=-3.04V$

$Al(s)\rightarrow Al^{3+}(aq)+3e^-;E^o_{Al^{3+}/Al}=-1.662V$

As the value of standard reduction potential of aluminium is less negative. Thus, it undergoes reduction reaction and lithium will undergo oxidation reaction.

The half-reaction follows:

Oxidation half-reaction: $Li(s)\rightarrow Li^+(aq)+e^-$ ( × 3)

Reduction half-reaction: $Al^{3+}(aq)+3e^-\rightarrow Al(s)$

Overall cell-reaction: $3Li(s)+Al^{3+}(aq)\rightarrow 3Li^+(aq)+Al(s)$

Hence, the correct option is B): Li(s) with $Al^{3+}$ (aq)

5 0

3 years ago

An atomic mass unit is equal to

german

One-twelfth the mass of a carbon-12

3 0

4 years ago

Read 2 more answers

What is the molarity of a solution of hf if 4.400 moles of hf are added to a container and filled with water to a final volume o

Natasha2012 [34]

Answer is: the molarity of a solution of HF is 0.73 M.

n(HF) = 4.400 mol; amount of hydrofluoric acid.

V(HF) = 6.00 l; volume of hydrofluoric acid.

c(HF) = n(HF) ÷ V(HF).

c(HF) = 4.400 mol ÷ 6.00 l.

c(HF) = 0.733 mol/l; molarity of a solution (hydrofluoric acid).

6 0

3 years ago

The tendency of molecules to move toward areas of low concentration is called______.

Tems11 [23]

I think the answer is D. Diffusion

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3 years ago

Weathering, Erosion, and Deposition Questions

timama [110]

Ok sure i will help
1.weathring
2.deposition
3.erosion
4. water, ice, and moving water
5. deposition
6. deposition
7. deposition
8. Erosion

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3 years ago