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garik1379 [7]
3 years ago
13

How did you figure out the number of neutrons in each atom?

Chemistry
1 answer:
Ulleksa [173]3 years ago
8 0

Answer:

To get number of neutrons, you must have the mass number and atomic number of that atom.

neutrons = mass \: number - atomic \: number \\

atomic number is number of protons

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Why is the expectation value of the energy associated with the 1-D "particle-in-a-box" the same as the eigen value of the Hamilt
Veronika [31]

Answer: The average potential energy of the PIB is 0 irrespective of the wave function.

Explanation:

⟨H⟩=⟨KE⟩+⟨V⟩

the nn quantum number

⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

the average kinetic energy of the wavefunction is dependent on

⟨V⟩=∫sin(kx)0sin(kx)dx=0

The average potential energy of the PIB is 0 irrespective of the wave function.

⟨H⟩=⟨KE⟩=(π^2 ℏ^2)/(2mL^2 )

4 0
3 years ago
The mass of an element is 27 and it's atomic number is 13. Give the composition of the nucleus of it's atom.
love history [14]

Answer:

nucleus consists of:

13 protons, 14 neutrons

8 0
3 years ago
State two example of how engineers use their knowledge of atoms to create new technologies?( I am giving you high points for thi
Eduardwww [97]

The correct answer to this open question is the following.

Two examples of how engineers use their knowledge of atoms to create new technologies would be the following.

1.- Engineers can develop new medicines for chronic diseases when they use their knowledge about atoms. With new technologies and different scientific approaches, this new molecular medicine can be more effective in the treatment of terrible diseases that affect humans. The challenge lies in how to make these new medicines more affordable to all kinds of people, not only rich people.

2.- Engineers can also apply their knowledge about atoms to improve the water conditions so more people can have freshwater. Engineers that specialize in the environment can research the properties of water molecules and atoms, so they can develop new ways to purify and improve the quality of water, that we know that water scarcity is a major problem in many parts of the world.

4 0
4 years ago
Limestone has a density of 2.72 g/cm3. What is the mass of 8.92 cm3 of limestone?
timurjin [86]
It should be 24.2624 because if there’s 2.72g in every cm3 and there are 8.92 cm3, then you simply multiply the two numbers
hope this helped :)
8 0
3 years ago
Read 2 more answers
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Varvara68 [4.7K]
170km/h this probs right i think
7 0
4 years ago
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