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Yuri [45]
2 years ago
11

Question 1. In the following equation for the alpha decay of bismuth-214, supply the missing element that correctly completes th

e equation.
Question 2. Complete the following equations by correctly matching the appropriate product.

Chemistry
2 answers:
Klio2033 [76]2 years ago
7 0
Q1. TI (210/81Thallium)
Q2.
The answers are opposite from each other

stiv31 [10]2 years ago
4 0

Answer: a) Tl (Thallium)

b) ^{210}_{84}\textrm{Bi}\rightarrow ^{206}_{82}\textrm{Pb}+^4_2\textrm{He}

^{218}_{84}\textrm{Bi}\rightarrow ^{214}_{82}\textrm{Pb}+^4_2\textrm{He}

^{214}_{84}\textrm{Bi}\rightarrow ^{210}_{82}\textrm{X}+^4_2\textrm{He}

Explanation:

Alpha decay : When a larger nuclei decays into smaller nuclei by releasing alpha particle. In this process, the mass number and atomic number is reduced by 4 and 2 units respectively.

General representation of an element is given as:   _Z^A\textrm{X}

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

Total mass on reactant side = total mass on product side

214= A + 4 , A = 210

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

83= Z + 2, Z = 81

^{214}_{83}\textrm{Bi}\rightarrow ^{A}_{Z}\textrm{X}+^4_2\textrm{He}

b)

1. ^{210}_{84}\textrm{Bi}\rightarrow ^{206}_{82}\textrm{Pb}+^4_2\textrm{He}

Total mass on reactant side = total mass on product side

210= A + 4 , A = 206

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

84= Z + 2, Z = 82

2. ^{218}_{84}\textrm{Bi}\rightarrow ^{214}_{82}\textrm{Pb}+^4_2\textrm{He}

Total mass on reactant side = total mass on product side

218= A + 4 , A = 214

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

84= Z + 2, Z = 82

3. ^{214}_{84}\textrm{Bi}\rightarrow ^{210}_{82}\textrm{X}+^4_2\textrm{He}

Total mass on reactant side = total mass on product side

214= A + 4 , A = 210

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

84= Z + 2, Z = 82

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Answer: a.  water cycle

Explanation:

A water cycle can be define as the cycle of water in which water in various states like solid, liquid and gaseous forms circulates in different spheres of the earth. It describes how water evaporates from the surface of earth, the water vapors accumulate in the atmosphere, these water vapors become cool and condense in the form of rain or other kind of precipitations. The water cycle plays an important role in changing the weather condition of a region.

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What is the concentration in milligrams per milliter of a solution containing 23.5 meq sodium chlorise per milliliter? mw nacl =
ValentinkaMS [17]

1374.75 is the concentration in milligrams per ml of a solution containing 23.5 meq sodium chloride per milliliter.

Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume.

It is calculated in mg/ml.

The unit of measurement frequently used for electrolytes is the milliequivalent (mEq). This value compares an element's chemical activity, or combining power, to that of 1 mg of hydrogen.

Formula for calculating concentration in mg/ml is

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Molecular weight pf NaCl = 58.5 g/mol

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Putting the values into the formula

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Learn more about Concentration here brainly.com/question/14500335

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2 years ago
What is the easiest way to explain molecular compounds and covalent bonds also adding information about valance electrons?
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Answer:

Molecular compounds consist of two or more nonmetals. The nonmetals that make up a molecular compound are held together by covalent/molecular bonds. Covalent bonds is known as the "sharing" of valence electrons between two or more chemical species. Valence electrons are shared so that the atoms of the compound can become stable, much like how ionic bonds transfer valence electrons between atoms to achieve stability.

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Answer:

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Or

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True or false 4 questions help please!
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Answer:

Explanation:

True or false 4 questions help please!

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True

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True

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False

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True  TRUE

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