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vivado [14]
2 years ago
10

What causes the lines in the spectrum for elements? a continuous release of energy from the heated element a quantum absorption

of energy as various electrons are excited to a higher energy level a quantum release of energy as electrons drop back to their ground state none of the above
Chemistry
2 answers:
solmaris [256]2 years ago
5 0

Answer:a quantum absorption of energy

Explanation:

Bohr’s model explains the spectral lines .While the electron of the atom remains in the ground state, its energy is unchanged. When the atom absorbs one or more quanta of energy, the electron moves from the ground state orbit to an excited state and when the atom relaxes back to a lower energy state, it releases energy that is again equal to the difference in energy of the two orbits.

Nitella [24]2 years ago
5 0

Answer:

A quantum release of energy as electrons drop back to their ground state.

Explanation:

An atom of an element is said to be in its ground state when its electron is in the lowest energy orbit or shell of n=1.

However, when the electron absorbs energy it gets excited and jumps from this lower energy level to a higher energy level. Depending on the amount of energy absorbed, different energy orbits can be reached.

Also, in that excited state, the electron can lose energy and drop from orbit to orbit. This energy released is in discrete packets called quantum ( plural quanta ) and, using a spectrometer, can be observed as different lines, called the atomic line spectra, depending on the orbit the electron is dropping from.

A quantum of energy is given by:

E = hv = hc/

Where h = Planck's constant = 6.62 x 10-27 ergsec, c = velocity of light = 3 x 1010 cm/sec, v = frequency of the quantum energy emitted or absorbed in sec-1, = wavelength in cm.

There are 5 series of the atomic spectra in various regions of the electromagnetic spectrum for n = 1,2,3,4,5 respectively as, Lyman, Balmer, Paschen, Brackett, Pfund.

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___AsCl3+____H2S-->___As2S3+___HCI​
Alex17521 [72]

Answer:

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

Explanation:

When we balance a chemical equation, what we are trying to do is to achieve the same number of atoms for each element on both sides of the arrow. On the right of the arrow is where we can find the products, while the reactants are found on the left of the arrow.

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AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 1

Cl --- 3

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

2 AsCl₃ + H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 2

S --- 1

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of As atoms is now balanced.

2 AsCl₃ + 3 H₂S → As₂S₃ +HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 1

H --- 1

S --- 3

The number of S atoms is now equal on both sides.

2 AsCl₃ + 3 H₂S → As₂S₃ + 6 HCl

<u>reactants</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

<u>products</u>

As --- 2

Cl --- 6

H --- 6

S --- 3

The equation is now balanced.

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2 years ago
Identify the base-conjugate acid pair in this balanced equation:
Elan Coil [88]
<h3><u>Answer;</u></h3>

NH3/NH4+

<h3><u>Explanation;</u></h3>

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NH3 is the base; while NH4+ is the conjugate acid  

HNO3 is the acid; while NO3- is the conjugate base  

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