Answer:
The answer to your question is U-234
Explanation:
Data
Thorium-234
beta emission twice
Definition
Beta emission is when a beta particle (electron) is emitted from an atomic nucleus.
First beta emission
²³⁴₉₀Th ⇒ ²³⁴₉₁Pa + e⁻
Second beta emission
²³⁴₉₁ Pa ⇒ ²³⁴₉₂U + e⁻
The atom will be Uranium-324
1)Na and O - ion bond
2)K and F - ion bond
3)Ne and O - no bond (as Ne is a noble gas)
And by elimination, your answer is 4)
Answer:
Newton's first and third law of Motion
Explanation:
The laws applying in the example Newton's first and third laws of Motion.
- The first law states that any object at rest (ie. not moving) will stay at rest until it is forced to move by an external force. In this case, said force were the propulsion gases ignited.
- As the hot gases were pushed out from the engine nozzle, there was another force <em>equal in magnitud but opposite in direction</em> (as the gases went down, that force went upwards), said force is directly responsible for the rocket taking off. That is an example of the third law.
Because chemistry is a new science , a lot of new information that is hard to understand for most students. If one doesn't study enough or put the work in to understand all the new concepts and such , it's hard to pass the class :(
An example of a structure that contains amide is the nylon, paracetamol, and dimethylformamide.
<h3>What is an amide?</h3>
An amide is defined as the organic chemical compound which is a functional group that contains carbonyl group bonded to a nitrogen or any compound containing this functional group.
Typical examples of compounds that contains an amide group include the following:
- Nylon: This is a chemical compound that contains synthetic copolymer composed of secondary amides separated by two or more methylene groups.
- paracetamol, and
- dimethylformamide.
Learn more about nylon here:
brainly.com/question/25835424
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