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
Gelneren [198K]
3 years ago
9

Why was Niels Bohr’s atomic model superior to all the earlier models?

Chemistry
2 answers:
yanalaym [24]3 years ago
8 0

Answer:

As it demonstrated that how the electron could orbit the nucleus without falling into it.

Explanation:

According to Bohr's model, the electrons revolve around the nucleus at a confined distance in fixed orbits. As long as the electrons move around the orbits, they neither lost nor attain any kind of energy. The jumping of electrons from one orbit to another only takes place when some kind of energy is lost or is supplied.  

Hence, the atom will remain completely stable in the state comprising the smallest orbit, as there is no orbit of lower energy into which the jumping of electrons takes place. Therefore, Bohr's atomic model is superior to all the previous models, as it has demonstrated how the electrons could revolve around the nucleus without falling into it.  

gladu [14]3 years ago
6 0
1) it explains about stability of an atom by including stationary state.
2) it explains tge quantization of energy.
3) it gives the concept of angular momentum of a revolving electron.
You might be interested in
Ammonia, NH3, is used as a refrigerant. At its boiling point of –33 oC, the standard enthalpy of vaporization of ammonia is 23.3
mario62 [17]

Answer:

-68.4 kJ

Explanation:

<u>The standard enthalpy of vaporization = 23.3 kJ/mol</u>

<u>which means the energy required to vaporize 1 mole of ammonia at its boiling point (-33 °C).</u>

To calculate heat released when 50.0 g of ammonia is condensed at -33 °C.

This is the opposite of enthalpy of vaporization which means that same magnitude of heat is released.

<u>Thus,  Q = -23.3 kJ/mol</u>

<u>Where negative sign signifies release of heat</u>

Given: mass of 50.0 g

Molar mass of ammonia = 17.034 g/mol

Moles of ammonia = 50.0 /17.034 moles = 2.9353 moles

Also,

1 mole of ammonia when condenses at -33 °C releases 23.3 kJ

2.9412 moles of ammonia when condenses at -33 °C releases 23.3×2.9353 kJ

<u>Thus, amount of heat released when 50 g of ammonia condensed at -33 °C= -68.4 kJ, where negative sign signifies release of heat.</u>

4 0
3 years ago
Help solve this page please
AURORKA [14]

Answer:

man, i have the same problem, i don't know hpw to solve this

8 0
3 years ago
What is the number of copper atom in one naira coin which weight is 7.3g a sum of the material is 86%
Step2247 [10]

Answer:

5.9x10²² atoms of Cu are in one naira coin

Explanation:

To solve this question we need to find the mass of Copper. Then, using its molar mass (Cu = 63.546g/mol) we must find the moles of Cu and its atoms using Avogadro's number:

<em>Mass Cu:</em>

7.3g * 86% = 6.278g is the mass of Cu.

<em>Moles Cu:</em>

6.278g * (1mol / 63.546g) = 0.099moles Cu

<em>Atoms Cu:</em>

0.099moles Cu * (6.022x10²³atoms / 1mol) =

<h3>5.9x10²² atoms of Cu are in one naira coin</h3>
4 0
3 years ago
What will the presence of H+ ions in a solution cause?
leva [86]
H+ ions are proton charged ions that are present
6 0
3 years ago
Read 2 more answers
What are the missing coefficients for the chemical equation <br> [ ] Ca + [ ] O2 → [ ] CaO
katen-ka-za [31]

Answer:

{ \sf{[ 2] Ca_{(s)} + [1 ] O_{2(g)} → [ 2] CaO _{(s)}}}

4 0
3 years ago
Other questions:
  • What two stereoisomeric alkanes are formed in the catalytic hydrogenation of (Z)-3-methyl-2-hexene? Draw and label the alkanes.
    11·1 answer
  • How would temperature changes in the atmosphere enough to melt Antarctic Ice affect the hydrosphere lithosphere and biosphere
    5·2 answers
  • How many molecules in n2o2 molar mass is 92.02g
    9·1 answer
  • 24. Which description correctly identifies the substance below?*
    14·1 answer
  • Which equation would be used to calculate the rate constant from initial<br> concentrations?
    15·2 answers
  • No longer need to be answered.
    12·1 answer
  • Which describes the titration graph when a strong acid is titrated by a weak base?
    5·1 answer
  • If you have 5.22*1022 molecules of glucose (C6H12O6) how many grams is this?
    12·1 answer
  • If charcoal and sugar were present in crude benzoic acid, would recrystallization from water be a good method of purification? W
    15·1 answer
  • What volume will 5.6 moles of sulfur hexafluoride
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!