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1 year ago

Write balanced nuclear equations for the following:(b) Alpha decay of polonium-218

1 answer:

7 0

The balanced nuclear equations for the following:(b) Formation of polonium-218 through α decay is (210,83)Bi -> (4,2)alpha + (210,81)Po

<h3>What is balanced nuclear equation?</h3>

A nuclear reaction is generally expressed by a nuclear equation, which has the general form, where T is the target nucleus, B is the bombarding particle, R is the residual product nucleus, and E is the ejected particle, and Ai and Zi (where I = 1, 2, 3, 4) are the mass number and atomic number, respectively. Finding a well balanced equation is critical for understanding nuclear reactions. Balanced nuclear equations provide excellent information about the energy released in nuclear reactions. Balancing the nuclear equation requires equating the total atomic number as well as the total mass number before and after the reaction using the rules of atomic number and mass number conservation in a nuclear reaction.

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Choose the correct total number of electron domains (bonding and nonbonding) about a central atom if the angle(s) between the el

slamgirl [31]

Answer:

The central atom has 3 electron domains.

Explanation:

According to the Valence Shell electron pair repulsion theory (VSEPR) put forward by Gillespie and Nyholm in 1957, the shape of a molecule is determined by repulsion between all the electron pairs (electron domains) present in the valence shell.

The electron pairs or electron domains are known to position themselves as far apart in space as possible in order to minimize repulsions.

Hence, when the central atom of a molecule contains three electron domains, they are positioned at an angle of 120° from each other to minimize repulsions. Hence the answer.

5 0

3 years ago

Is the following a redox reaction? Explain.<br> NH₃(aq) + HCl(aq) → NH₄Cl(aq)

jeyben [28]

The process is not a redox reaction.

The reaction between ammonia $(NH_{3} )$ and hydrochloric acid (HCl) to produce ammonium chloride ( $NH_{4} Cl$ ) has modified the oxidation number of no atom in the reactants. As a base, ammonia interacts easily with hydrochloric acid to produce ammonium chloride salt. A neutralization reaction between an acid and a base is what the described process is, and it is NOT a redox reaction.

A reaction is referred to as a redox reaction if two or more reactants belonging to a single reaction exchange one or more electrons, i.e., one reactant releases one or more additional electrons while the other obtains one or additional electrons. The reacted substance that releases electrons is oxidized and becomes a reducing substance. A reduced oxidizing agent is the reactant that accepts electrons.

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3 0

1 year ago

Flooding can cause streams to flow along different paths as a result of the _____.

Sveta_85 [38]

Answer:

A. prevention of further erosion

I hope this is the correct answer

4 0

3 years ago

How many moles make up 5.7491x1025 molecules of Dinitrogen pentoxide (N2O5)?

pav-90 [236]

Answer:

<h2>95.5 moles</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

$n = \frac{N}{L} \\$

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

$n = \frac{5.7491 \times {10}^{25} }{6.02 \times {10}^{23} } \\$

We have the final answer as

<h3>95.5 moles to 3 sig. figures</h3>

Hope this helps you

6 0

3 years ago

HELP !! For the principal quantum number n equals 2, we can have<br> sub-levels.

Charra [1.4K]

Answer: d both a and b

Explanation:

6 0

2 years ago