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3 years ago

List the numbers of protons, neutrons, and electrons in Chlorine-18. (3 points)

Chemistry

1 answer:

Mama L [17]3 years ago

8 0

The electronic configuration of Chlorine is 1s2 2s2 2p6 3s2 3p5.

There are three energy levels in chlorine

First energy level is n=1 has 1s2 so total 2 electrons

Second energy level is n=2, 2s2 2p6 so total 2+6= 8 electrons

Third has 3s2 3p5 electrons just 7 total... p can contain 6 electrons but only 5 are present. So the third level has lesser number of electrons than that can be filled

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WITCHER [35]

I believe the correct answer from the choices listed above is the third option. The oxidation number of Nitrogen in HNO2 would be +3. It is calculated as follows:

1 + x + (-2)(2) = 0
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Hope this answers the question. Have a nice day.

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3 years ago

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Sunny_sXe [5.5K]

Answer:

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3 years ago

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cestrela7 [59]

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3 years ago

Read 2 more answers

Microwave ovens emit microwave energy with a wavelength of .129 m. What is the energy of exactly one photon of this microwave ra

gayaneshka [121]

λ=Wavelength = .129 m = 0.129 m

E = energy = ?

h =Planck constant = 6.63 × 10^-34 J.s

f = frequency of photo/ electromagnetic radiation = c/λ

c = Speed of light in a vacuum = 3 × 10^8 m/s

___o___o___

$E = hf \\ \\ E = h \frac{c}{λ} \\ \\ E = 6.63 \times {10}^{ - 34} \frac{3 \times {10}^{8} }{0.129} \\ \\ E = \frac{6.63 \times {10}^{ - 34} \times 3 \times {10}^{8} }{0.129} \\ \\ E = \frac{663 \times {10}^{ - 36} \times 3 \times {10}^{8} }{129 \times {10}^{ - 3} } \\ \\E = \frac{1989 \times {10}^{ - 28} }{129 \times {10}^{ - 3} } \\ \\ E = 15.4 \times {10}^{ - 25} J \\ \\ E = 1.54 \times {10}^{ - 24} J$

I hope I helped you^_^

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2 years ago

What is the frequency, in hertz, of blue light having a wavelength of 4.25 x 10-?m? Your answer should be

Naddik [55]

Answer:

7.05*10^16(when wavelength =4.25*10^-9m)

Explanation:

c=wavelength *frequency (f)

i.e. f=c/wavelength =3*10^8/4.25*10^-9=7.05*10^16

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2 years ago