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
Colt1911 [192]
3 years ago
8

Select all of the following statements that are basic assumptions of the Bohr model of the atom. Atoms have a central nucleus wi

th electrons in orbit about this nucleus. Atoms are made of positive material with electrons fixed in place in this positive material. Electrons can jump from one orbit to another around the nucleus. They must gain energy to jump to a higher level, and they release energy when jumping to a lower level. Electrons orbit the nucleus, but the orbits can have only certain sizes and energy values. Atoms are solid spheres of matter.
Chemistry
1 answer:
Alekssandra [29.7K]3 years ago
7 0

Answer:

The assumptions of the Bohr model of the atom are:

- Atoms have a central nucleus with electrons in orbit about this nucleus.

- They must gain energy to jump to a higher level, and they release energy when jumping to a lower level.

- Electrons orbit the nucleus, but the orbits can have only certain sizes and energy values.

Explanation:

The Bohr model of the atom establishes that atoms have a central nucleus with positive charge and electrons (with a negative charge) in orbit about this nucleus. In the Bohr model, electrons move in specific orbits with a certain amount of energy and can't jump from one orbit to another around the nucleus. To jump to a higher level, they must gain energy or release energy when jumping to a lower level.

The Thomson model of the atom postulated that <em>atoms are solid spheres of matter</em> and <em>are made of positive material with electrons fixed in place in this positive material</em>.

You might be interested in
Convert the temperature of the coldest area in freezer, -10 fahrenheit, to degrees celsius and kelvin.
babunello [35]

Answer : The temperature in degree Celsius and Kelvin are, -23.33^oF\text{ and }249.82K

Explanation :

The conversion used for the temperature from Fahrenheit to degree Celsius is:

^oC=(^oF-32)\times \frac{5}{9}

where,

^oF = temperature in Fahrenheit

^oC = temperature in centigrade

The conversion used for the temperature from degree Celsius to Kelvin is:

K=273.15+^oC

where,

K = temperature in Kelvin

^oC = temperature in centigrade

As we are given the temperature in Fahrenheit is, -10

Now we have to determine the temperature in degree Celsius.

^oC=(^oF-32)\times \frac{5}{9}

^oC=(-10^oF-32)\times \frac{5}{9}

^oC=-23.33

Now we have to determine the temperature in Kelvin.

K=273.15+^oC

K=273.15+(-23.33^oC)

K=249.82

Therefore, the temperature in degree Celsius and Kelvin are, -23.33^oF\text{ and }249.82K

5 0
3 years ago
Read 2 more answers
Identify 3 characteristics that would be taken into consideration when evaluating any proposed site for a national repository of
Mashutka [201]

Answer:

  • Proximity to water bed/water source
  • Geographical isolation and barriers
  • unavailability of plant or any biosystem

Explanation:

A nuclear repository would be required to be isolated with barriers in place to keep people out. Ideally, it should be stored underground and away from any underlying waterways, or biosystems so as to avoid contamination. A good example would be the proposed Yucca Mountain repository.

I hope this was helpful and useful.

7 0
3 years ago
Does the biosphere have clear boundaries
Ne4ueva [31]

No, the biosphere does not exhibit a clear boundary as life always comes to an end.  

The biosphere comprises all the living things of the world, like all the plants and animals. It is considered as the global ecosystem, that is, the gathering of all the planet's ecosystems. It comprises the land and the atmosphere. It is usually considered as the zone of life, where all the species of the planet thrives.  


7 0
3 years ago
present day india is in south asia at the northern end of the indian ocean what evidence found in india matches that of other lo
alekssr [168]

Answer:

Lystrosaurus fossils are just found in Antarctica, India, and South Africa. Like the land abiding Cynognathus, the Lystrosaurus would have not had the swimming capacity to navigate any sea. Advanced portrayal of the Glossopteris. Potentially the main fossil proof found is the plant, Glossopteris.

Explanation:

Hope it helps

5 0
2 years ago
For a first-order reaction, A → B, the rate coefficient was found to be 3.4 × 10-4 s-1 at 23 °C. After 5.0 h, the concentration
Illusion [34]

Answer:

the original concentration of A = 0.0817092  M

Explanation:

A reaction is considered to be of first order it it strictly obeys the graphical equation method.

k_1 = \dfrac{2.303}{t}log \dfrac{a}{a-x}

where;

k = the specific rate coefficient  = 3.4 × 10⁻⁴ s⁻¹

t = time   = 5.0 h = 5.0 × 3600 = 18000 seconds

a = initial concentration = ???

a - x = remaining concentration of initial concentration at time t = 0.00018 mol L⁻¹

3.4 \times 10^{-4}= \dfrac{2.303}{18000}log \dfrac{a}{0.00018}

3.4 \times 10^{-4}= 1.27944 \times 10^{-4} \times log \dfrac{a}{0.00018}

\dfrac{3.4 \times 10^{-4}}{1.27944 \times 10^{-4}}=   log \dfrac{a}{0.00018}

2.657=   log \dfrac{a}{0.00018}

10^{2.657}= \dfrac{a}{0.00018}

453.94 = \dfrac{a}{0.00018}

a =453.94 \times 0.00018

a = 0.0817092  M

Thus , the original concentration of A = 0.0817092  M

8 0
3 years ago
Other questions:
  • Distilled water is _____.<br> an acid<br> a base<br> a neutral
    10·1 answer
  • Potassium chloride and oxygen gas are formed upon heating potassium
    6·1 answer
  • What happens to the nutrients absorbed in the<br> small intestine?
    13·1 answer
  • 1. What are some similarities between the dogs pictured? What are some differences?
    5·1 answer
  • Complete PDF file of inorganic chemistry​
    7·1 answer
  • Help please thank you!
    9·1 answer
  • (I will give brainliest to the person who answered my question correctly!)
    9·1 answer
  • Magma generated by a hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's
    7·2 answers
  • Pls help its really hard to do
    13·2 answers
  • Please answer!!<br> No links.<br> Picture is included!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!