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nignag [31]
3 years ago
7

ccording to the Bohr model of the atom, when an electron goes from a higher-energy orbit to a lower-energy orbit, it ________ el

ectromagnetic energy with an energy that is equal to the ________ between the two orbits.
Chemistry
1 answer:
marishachu [46]3 years ago
7 0

Answer:

1. Absorbs electromagnetic energy

2. Energy difference between the two orbits.

Explanation:

Bohr precisely describe the processes of absorption and emission of energy in terms of electronic structure. According to Bohr's model, an electron would absorb energy in the form of photons to get excited to a higher energy level as long as the photon's energy was equal to the energy difference between the initial and final energy levels. After jumping to the higher energy level or the excited state, the excited electron would be in a less stable position, so it would quickly emit a photon to relax back to a lower, more stable energy level.

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3 years ago
30,000 J of heat are added to 23.0 kg of steel to reach a final temperature of 140
kolbaska11 [484]

The initial temperature is 137.34 °C.

<u>Explanation:</u>

As the specific heat formula says that the heat energy required is directly proportional to the mass and change in temperature of the system.

Q = mcΔT

So, here the mass m is given as 23 kg, the specific heat of steel is given as c = 490 J/kg°C and the initial temperature is required to find with the final temperature being 140 °C. Also the heat energy required is 30,000 J.

ΔT =\frac{Q}{mc}

ΔT =\frac{30000}{23 \times 490} = \frac{30000}{11270} =2.66

Since the difference in temperature is 2.66, then the initial temperature will be

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140-Initial temperature = 2.66

Initial temperature = 140-2.66 = 137.34 °C

Thus, the initial temperature is 137.34 °C.

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3 years ago
How can two atoms of the same chemical element be different?
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strontium-90 has a half life of 29 years. if a site held 4000 kg of this isotope, approximately what mass of strontium-90 would
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2 years ago
Which of the following describes a covalent bond?
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Answer:

D. It is the sharing of electrons between atoms with an electronegativity difference below 1.7

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7 0
3 years ago
Read 2 more answers
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