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4 years ago

Which statement about valence electrons is true?

Physics

2 answers:

Mariulka [41]4 years ago

8 0

Answer:

The correct answer is A

Butoxors [25]4 years ago

3 0

Answer:

They are the outer shell of an atom, So the most logical would be A.

Explanation:

According to a search i made a while ago about valence electrons, valence electron is an outer shell electron that is associated with an atom.

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What is the momentum of a 1200 kg car traveling with a speed of 27 m/s (60 mph)?

serious [3.7K]

Answer:

This is your answer

Explanation:

Actually I took this from go ogle

3 0

3 years ago

In which type of circuit does charge move in only one direction?

Lesechka [4]

C. A combined circuit
That’s the answer

3 0

3 years ago

what is the frequency of the photon emitted by a hydrogen atom when its electron drops from the n = 6 to n = 4 energy level?

Gemiola [76]

The frequency of the photon emitted by a hydrogen atom is $26.2*10^-^4 hz$

<h3>What are Photons?</h3>

A particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

In the case of light, the frequency, symbolized by the Greek letter nu (ν), of any wave equals the speed of light, c, divided by the wavelength λ:

v = c/λ

Since the wavelength λ is in the bottom of the fraction, the frequency is inversely proportional to the wavelength.

v = c/λ

v= $\frac{3*10^8}{434*10^-^9} = 6.91*10^1^4 Hz$

By using Rydberg's formula,

1/λ $= Rz^2(\frac{1}{n_1^2} - \frac{1}{n_2^2})$

1/λ = $109677 *(\frac{1}{4^2} - \frac{1}{6^2}) = 3808.22 cm^-^1$

λ = $26.2*10^-^4 hz$

$26.2*10^-^4 hz$ is frequency of the photon emitted by a hydrogen atom.

Learn more about Photons here:brainly.com/question/20912241

#SPJ1

4 0

2 years ago

What about an atom can we learn by studying the bohr model?

zubka84 [21]

Answer:

The Bohr model shows that the electrons in atoms are in orbits of differing energy around the nucleus

Explanation:

(think of planets orbiting around the sun). Bohr used the term energy levels (or shells) to describe these orbits of differing energy.

8 0

2 years ago

Batteries are usually identified by their voltage.

Fynjy0 [20]

Answer:

Explanation:

Given parameters:

Electrical energy = 18J

Quantity of charge Q = 12C

Unknown:

Voltage = ?

Solution:

The expression of electrical potential energy is given as:

Electrical potential energy = $\frac{1}{2}$ c v²

c is the quantity of charge

v is the voltage

18 = $\frac{1}{2}$ x 12 x v²

18 = 6v²

v² = 3

v = 1.7v

7 0

3 years ago