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Darya [45]
3 years ago
8

The technetium-99 nuclide radioactively decays by beta emission. write a balanced nuclear chemical equation that describes this

process.
Chemistry
1 answer:
nekit [7.7K]3 years ago
7 0
Tc-99m<span> is a </span>metastable  isomer<span> of </span>Tc-99. It finds widespread applications in <span>medical diagnostic procedures.
</span>
Tc-99 is also a radioactive element. It's half-life is 2,11,000 years. Upon radioactive decay, it emits beta particles and gets converted into stable compound Ruthenium-99

This process of radioactive decay is shown below.
99 43Tc    →       99 44Ru     +     0 -1e
                            (stable)           (β particle)
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Answer:

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3 years ago
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Answer:

2.22 g/L

Explanation:

There's a relationship using the ideal gas law between molar mass and density: MM=\frac{dRT}{P}, where MM is the molar mass, d is the density, R is the gas constant, T is the temperature, and P is the pressure.

We know from the problem that MM = 32.49 g/mol, T = 458 Kelvin, and P = 2.569 atm. The gas constant, R, in terms of the units atm and Kelvin is 0.08206. Let's substitute these values into the formula:

MM=\frac{dRT}{P}

32.49g/mol=\frac{d*0.08206*458K}{2.569atm}

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4 years ago
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Due to its small size, lithium has a high melting and boiling point.

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<h3>Alkali metals</h3>

The chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium make up the alkali metals (Fr). They make up group 1, which is located in the s-block of the periodic table, along with hydrogen.

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2 years ago
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