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just olya [345]
3 years ago
6

. Write the following isotope in nuclide notation (e.g., “ ”): copper-70

Chemistry
1 answer:
Ede4ka [16]3 years ago
6 0

Answer:

  •            ^{70}_{29}Cu

Explanation:

The <em>nuclide isotope notation</em> represents the isotope by its chemical symbol preceded by a superscript (to the left of the chemical symbol) showing the mass number and a subscript (also the the left of the chemical symbol) showing the atomic number (number of protons).

<em>Copper-70:</em>

  • Chemical symbol: Cu
  • Mass number: 70
  • Atomic number: 29 (the atomic number is found in any periodic table)

<em>Nuclide notation</em>:

  •            ^{70}_{29}Cu
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Prform the following operation and express the answer in scientific notation 6.0 x 10^3-2.310^3
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The value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

<h3> What is scientific notation?</h3>

Scientific notation is a way to write very large or very small numbers so that they are easier to read and work with.

You express a number as the product of a number greater than or equal to 1 but less than 10 and an integral power of 10 .

<h3>Why it is used? </h3>

There are two reasons to use scientific notation.

  • The first is to reveal honest uncertainty in experimental measurements.
  • The second is to express very large or very small numbers so they are easier to read.

Given,

= 6.0 x 10^3- 2.3 × 10^3

= (6.0 - 2.3) × 10^3

= 3.7 × 10^3

Thus, we find that the value 6.0 x 10^3- 2.3 × 10^3 in scientific notation is 3.7 × 10^3.

learn more about scientific notation :

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2 years ago
Identify the main purpose of the Periodic Table. *
saw5 [17]

The periodic table is one of the most important tools in the history of chemistry. It describes the atomic properties of every known chemical element in a concise format, including the atomic number, atomic mass and relationships between the elements. Elements with similar chemical properties are arranged in columns in the periodic table.

The table thus is a quick reference as to what elements may behave the same chemically or which may have similar weights or atomic structures.

Hope this answer helps you

4 0
3 years ago
Asking high school students if the school day should be lengthened to improve
Alla [95]

Answer:

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Explanation:

3 0
3 years ago
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Calculate the rate constant at 200.°C for a reaction that has a rate constant of 8.30 × 10−4 s−1 at 90.°C and an activation ener
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Answer:

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Explanation:

Using the Arrhenius equation:

k = A * e^(-Ea/RT)

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A is frequency factor (1.5x10¹¹s⁻¹)

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And T is absolute temperature (24°C + 273 = 297K)

Replacing:

k = 1.5x10¹¹s⁻¹ * e^(-55800J/mol/8.314J/molK*297K)

k = 1.5x10¹¹s⁻¹ * 1.53x10⁻¹⁰

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Explanation:

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