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vodka [1.7K]
2 years ago
11

PLEASE HELP

Chemistry
1 answer:
Dovator [93]2 years ago
5 0

Answer:

B

Explanation:

All elements on both sides of the equation have the same amount of moles

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In a particular case of alpha decay, and isotope of uranium, U with a mass number of 238 and an atomic number of 92 emits and al
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Answer:

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  

Explanation:

Alpha beta and gamma radiations are the examples of ionizing radiations. When an atom is an excited state and having high energy, the atom is in unstable state. The excess of energy is released by the atom to get the stability. The released energy is in the form of radiations which may include alpha, beta, gamma, X-ray etc.

Alpha decay:

Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4  and atomic number less than 2 as compared to parent atom the starting atom.

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Alpha radiations can travel in a short distance.

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These radiations can be stopped by a piece of paper.

₉₂U²³⁸   →   ₉₀Th²³⁴  + ₂He⁴  

3 0
3 years ago
What causes velocity to change?
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Is the amount of water on earth always changing or is it a constant amount?​
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The amount of water on the Earth is constant, or nearly so. Actually, the amount is increasing ever so slightly due to volcanic eruptions expelling water vapor into the atmosphere, but, for all practical purposes, the amount of water (as a gas, liquid and as snow and ice) can be considered to be constant.

Explanation:

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