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Grace [21]
3 years ago
7

Which answer is an isotope of 40/20x? Question Pictured here:

Chemistry
1 answer:
Nesterboy [21]3 years ago
7 0

An isotope of ₂₀⁴⁰X  ⇒₂₀⁴⁴X

<h3>Further explanation </h3>

The elements in nature have several types of isotopes

Isotopes are atoms that have the same number of protons and a different number of neutrons.

So Isotopes are elements that have the same Atomic Number (Proton)

In the following element notation,

\large {{{A} \atop {Z}} \right X}

X = symbol of elemental atom

A = mass number

  = number of protons + number of neutrons

Z = atomic number

   = number of protons = number of electrons, on neutral elements

For symbol of isotope X :

₂₀X⁴⁰ : atomic number = 20, mass number = 40

A. ₄₀²⁰X : atomic number = 40, mass number = 20, neutrons=20

B. ₂₀⁴⁰X²⁺ : atomic number = 20, mass number = 40, neutrons=20

C. ₂₁⁴⁰X : atomic number = 21, mass number = 40, neutrons=19

D. ₂₀⁴⁴X : atomic number = 20, mass number = 44, neutrons=22

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Answer:

An atom becomes an Ion (a) if it gains one or more electron(s) or (b) if it loses one or more electron(s). When it gains electrons it becomes negatively charged and is called an anion. When it loses electron(s) it becomes positively charged and is called a cation.

Explanation:

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5 0
3 years ago
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A reaction with an unknown theoretical yield was carried out and the amount of product obtained was a third of the theoretical y
geniusboy [140]

by definition  

.. % yield = (actual yield / theoretical yield) * 100%  

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.. % yield = ((⅓ theoretical yield) / (theoretical yield)) * 100%  

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6 0
3 years ago
What effect does temperature have on the characteristics of magma?
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What effect does temperature have on the characteristics of magma?
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3 years ago
A 255-mL flask contains pure helium at a pressure of 746 torr . A second flask with a volume of 475 mL contains pure argon at a
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Answer:

pHe = 261 torr

pAr = 472 torr

P = 733 torr

Explanation:

The final volume for both gases is the same: V₂ = 255 mL + 475 mL = 730 mL

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He

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁ / V₂

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Ar

P₁ × V₁ = P₂ × V₂

P₂ = P₁ × V₁ / V₂

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