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4 years ago

6

Why are only certain colors absorbed by and emitted from an atom?

1 answer:

zavuch27 [327]4 years ago

6 0

The way I would explain it is quite difficult to understand, so this is what Google says. "The wavelength (or equivalently, frequency) of the photon is determined by the difference in energy between the two states. These emitted photons form the element's spectrum. The fact that only certain colors appear in an element's atomic emission spectrum means that only certain frequencies of light are emitted." I hope this helped.

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Set up a ripple tank with a wave generator on one side.

Simora [160]

when the waves pass from the deeper water to the shallower water its speed will decrease.

<h3>What is refraction of wave?</h3>

Refraction of wave is the change in direction of a wave passing from one medium to another caused by its change in speed.

For example, waves travel faster in deep water than in shallower water.

Thus, we can conclude that when the waves pass from the deeper water to the shallower water its speed will decrease.

Learn more about refraction of waves here: brainly.com/question/1360744

#SPJ1

6 0

2 years ago

An element crystallizes in a face-centered cubic lattice. If the length of an edge of the unit cell is 0.408 nm, and the density

V125BC [204]

Answer:

Au

Explanation:

For the density of a face-centered cubic:

$Density = \dfrac{4 \times M_w}{N_A \times a^3}$

where

$M_w$ = molar mass of the compound

$N_A=$ avogadro's constant

$a^3 =$ the volume of a unit cell

Given that:

Density $(\rho)$ = 19.30 g/cm³

a = 0.408 nm

a = $0.408 \times 10^{-9} \times 10^{2} \ cm$

a = $4.08 \times 10^ {-8} \ cm$

∴

$19.3 = \dfrac{4 \times M_w}{(6.023 \tmes 10^{23})\times (4.08 \times 10^{-8})^3}$

$M_w= \dfrac{19.3\times (6.023 \times 10^{23})\times (4.08 \times 10^{-8})^3}{4}$

$M_w=197.37 \ g/mol$

Thus, the molar mass of 197.37 g/mol element is Gold (Au).

4 0

3 years ago

What percentage of the atmosphere is carbon dioxide?.

stellarik [79]

Answer:

4%

Explanation:

the answer is 4% , hope this help

5 0

2 years ago

Calculate the density of unknown substance #1 which has a mass of 15.8 grams and a volume of 20 cm3. *

GenaCL600 [577]

Answer:

$\boxed{\sf Density \ of \ unknown \ substance = 0.79 \ g/cm^3}$

Given:

Mass = 15.8 g

Volume = 20 cm³

To Find:

Density of unknown substance

Explanation:

Formula:

$\boxed{ \bold{Density = \frac{Mass}{Volume}}}$

Substituting value of mass & volume in the formula:

$\sf \implies Density = \frac{15.8}{20} \\ \\ \sf \implies Density = 0.79 \: g/cm^3$

8 0

4 years ago

What do you read the arrow in a chemical equation as meaning?

Pani-rosa [81]

A product...............................................................

6 0

3 years ago