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sweet [91]
3 years ago
6

What are the chemical properties of chromium

Chemistry
1 answer:
tatyana61 [14]3 years ago
6 0
<span>Symbol- Cr
Oxidation States: 6, 3, 2, 0

Chromium is unstable in oxygen, it immediately produces a thin oxide layer that is impermeable to oxygen and protects the metal below. </span>
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A sample contains 16. 75 g of the radioisotope U-236 and 50. 25 g of its daughter isotope, Th-232. How long did it take for deca
garri49 [273]

The time taken for the isotope to decay is 46 million years.

We'll begin by calculating the number of half-lives that has elapsed. This can be obtained as follow:

  • Original amount (N₀) = 50.25 g
  • Amount remaining (N) = 16.75
  • Number of half-lives (n) =?

2ⁿ = N₀ / N

2ⁿ = N₀ / N

2ⁿ = 50.25 / 16.75

2ⁿ = 3

Take the log of both side

Log 2ⁿ = 3

nLog 2 = Log 3

Divide both side by log 2

n = Log 3 / Log 2

n = 2

Finally, we shall determine the time.

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t = n × t½

t = 2  × 23

t = 46 million years

Learn more about half-life: brainly.com/question/25927447

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480 hrs of electricity
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En que se fundamento Moseley para describir la tabla periódica actual?
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Answer:

La tabla periódica de moseley fue una manera de dar solución a esta problemática, ya que nos permite tener a la mano todos los elementos que se han descubierto hasta la actualidad y sus propiedades químicas más resaltantes.

A continuación se Describe una linea del tiempo de la creación de la tabla periodica:

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Explanation:

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Explanation:

F = nucleus

G = cell membrane

H = cytoplasm

J = cell wall

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L = plastids

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Which of the following has the LOWEST electronegativity?<br> A) As<br> B) N<br> C) BI<br> D) P
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