Explanation:
When plutonium - 239 undergoes an alpha decay, it produces uranium - 235 in the process.
A radioactive occurs when a nuclide spontaneously disintegrates due to instability to produce lighter atoms which the release of radiation and energy.
²³⁹₉₄Pu ⇒ ²³⁵₉₂U + ⁴₂He + energy
In a nuclear reaction, the mass and atomic numbers must always remain conserved. Nuclear reactions do not obey the law of conservation of matter and mass.
The mass number are the superscript before the symbol of the nuclide
The atomic number is the subscript.
The sum of the atomic number on the left hand side equals that on the right hand side. This goes for the mass number too.
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Balanced nuclear equation brainly.com/question/10094982
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Answer: The amount of movement of the particles depends on the amount of <u>force</u> acting on them and their relationship to other atoms.
Explanation:
The inter-atomic force determines the inter-atomic distance which governs the amount of movement of the particles.
For example in solids, the inter-atomic force is stronger and hence, the distance between any atoms is very very small which restricts the movement of the particles. On the other hand, in case of liquids and gases, the inter-atomic forces are not very strong and there is more distance between the atoms which allows free movement of particles.
The boiling and freezing point of water. You know this because at 0degrees water freezes and at 100 degrees water boils
A would be the correct answer. Its the only one to make sense since you are trying to solve the conflict!
Here are two leading theories to explain how the first galaxies formed. The truth may involve a bit of both ideas.
One says that galaxies were born when vast clouds of gas and dust collapsed under their own gravitational pull, allowing stars to form.
The other, which has gained strength in recent years, says the young universe contained many small "lumps" of matter, which clumped together to form galaxies. Hubble Space Telescope has photographed many such lumps, which may be the precursors to modern galaxies. According to this theory, most of the early large galaxies were spirals. But over time, many spirals merged to form ellipticals.
