1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novay_Z [31]
3 years ago
14

Consider the Bohr energy expression (Equation 30.13) as it applies to singly ionized helium He+ (Z = 2) and an ionized atom with

Z=5 and only a single electron orbiting the nucleus. This expression predicts equal electron energies for these two species for certain values of the quantum number n (the quantum number is different for each species). For quantum numbers less than or equal to 9, what is the highest energy (in electron volts) for which the helium energy level is equal to the ionized atom energy level?
Physics
1 answer:
ella [17]3 years ago
3 0

Answer:

Explanation:

Bohr's energy expression is as follows

E_n = 13.6 z² /n² where z is atomic no and n is principal quantum no of the atom .

z for helium is 2 and for ionised atom is 5 . Let energy of n₁ level of He is equal to energy level n₂ of ionised atom

so

13.6 x 2² / n₁² = 13.6 x 5² / n₂²

n₁ / n₂ = 2/5 , ie 2nd energy level of He matches 5 th energy level of ionised atom .

For quantum numbers less than or equal to 9 , If we take n₁ = 8 for He

Putting it in the equation above

2² / 8² = 5² / n₂²

n₂ = 5 x 8 / 2

= 20 .

energy

= -  13.6 x2² / 8²

= -  0.85 eV .

You might be interested in
Which of the following is NOT true? a. The higher the moment of inertia, the greater the resistance to changes in angular veloci
kaheart [24]

Answer:

Explanation:

The moment of inertia is the integral of the product of the squared distance by the mass differential. Is the mass equivalent in the rotational motion

a) True. When the moment of inertia is increased, more force is needed to reach acceleration, so it is more difficult to change the angular velocity that depends proportionally on the acceleration

b) True. The moment of inertia is part of the kinetic energy, which is composed of a linear and an angular part. Therefore, when applying the energy conservation theorem, the potential energy is transformed into kinetic energy, the rotational part increases with the moment of inertia, so there is less energy left for the linear part and consequently it falls slower

c) True. The moment of inertial proportional to the angular acceleration, when the acceleration decreases as well. Therefore, a smaller force can achieve the value of acceleration and the change in angular velocity. Consequently, less force is needed is easier

4 0
3 years ago
Which would cause the largest increase in a mountain climber’s gravitational potential energy?
Gemiola [76]

Most likely climbing up the mountain

4 0
3 years ago
A. Besides protons, what other particles make up an atom? Write 2 - 3 sentences describing how the electrostatic force acts betw
vodomira [7]

<u>Answer:</u>

For a. Neutrons and electrons also form an atom.

For b. The element is oxygen which is a non-metal and will form a negative ion while forming ionic bond.

<u>Explanation:</u>

  • <u>For a:</u>

There are 3 subatomic particles which form an atom. These are neutrons, protons and electrons.

Neutrons carry no charge, protons carry positive charge and electrons carry negative charge. Neutrons and protons are present in nucleus and electrons revolve around the nucleus.

The energy which is present between neutrons and protons are nuclear energy and the energy which is present between electrons and protons are electrostatic energy.

  • <u>For b:</u>

In an element, number of protons is always equal to the number of electrons. The atomic number is equal to the number of protons or electrons. The element which has atomic number 8 is Oxygen.

The electronic configuration of this element is 1s^22s^22p^4

This element requires only 2 electrons to form a stable electronic configuration. An element which gains electron is considered as a non-metal and forms a negative ion because number of electrons increases.

3 0
3 years ago
What is the sum of 231 + 5080 + 80 + 13 + 9​
Gemiola [76]

Answer:

5413

Explanation:

add them up

6 0
3 years ago
The disk that BTK sent to the television station contained just one valid file. What was the name of the file?
icang [17]

Answer:

The name of the file is Floppy.

Explanation:

Given that,

The disk that BTK sent to the television station contained just one valid file.

We need to find the name of the file

According to given data,

The disk that BTK sent to the television station contained just one valid file.

This file is called floppy.

Floppy :

The floppy disk is storage disk. It is made of thin and flexible disk of magnetic storage, It shape of square.

Floppy disk are read  and written to by floppy drive.

Hence, The name of the file is Floppy.

3 0
3 years ago
Other questions:
  • A 500g object falls off a cliff and losers 100 J from its gravitational potential energy store. if the gravitational field stren
    12·1 answer
  • Which volcanic hazard can block the sunlight and temporarily cool the Earth’s surface?
    13·2 answers
  • How are mass and inertia related?
    5·1 answer
  • (PLEASE HELP 20 POINTS)
    13·2 answers
  • Select the false statement. A. Only materials that have never been part of a living thing can be recycled in nature. B. Matter f
    10·1 answer
  • A cat rides a merry-go-round while turning with uniform circular motion. At time t1 = 2.00 s, the cat's velocity is v with arrow
    5·1 answer
  • Help please :) 15 points.
    8·1 answer
  • A 34-kg child on an 18-kg swing set swings back and forth through small angles. If the length of the very light supporting cable
    9·1 answer
  • A 65-kg person walks from the ground to the roof of a 100 m tall building. How much gravitational potential energy does she have
    12·1 answer
  • Light passing through the center of a lens will carry on undeviated.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!