2 years ago

What is meant by the half-life of a radioactive substance

Chemistry

1 answer:

Shtirlitz [24]2 years ago

3 0

Answer:

Explanation:

The half life of a radioactive atom is the time taken for half of the radioactive nuclei to disintegrate. The shorter the half life, the faster a radioactive nuclei decays.

Half life is often expressed as:

Half life = $\frac{0.693}{λ}$

Where λ is the decay constant.

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Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound

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Answer:

$698 \ THz$

Explanation:

Data provided as per the question below:-

Wavelength = 430.nm

The computation of the frequency of the light is shown below:-

Frequency = Velocity of light ÷ Wavelength

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Wavelength = 430 nm = $4.30 \times 10^-^7$ m

Frequency = $\frac{3.0 \times 10^8 \ m/s}{4.30 \times 10^-^7}$

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Therefore for determining the frequency we simply applied the above formula.

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Sawing a board in half is an example of a chemical change

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