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astra-53 [7]
3 years ago
14

Nitrogen has an atomic number of 7; therefore, it has ______ electrons in its outermost electron shell.

Chemistry
1 answer:
galina1969 [7]3 years ago
4 0
it has 5 electrons in it's outermost shell.
s 2e- , p 5e-
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An energy of 6.8 x 10^-19 J/atom is required to cause an aluminum atom on a metal surface to lose an electron.
Nana76 [90]

Wavelength of the light is 2.9 × 10⁻⁷ m.

<u>Explanation:</u>

Planck - Einstein equation shows the relationship between the energy of a photon and its frequency, and they are directly proportional to each other and  it is given by the equation as E = hν,

where E is the energy of the photon

h is the Planck's constant = 6.626 × 10⁻³⁴ J s

ν is the frequency

From the above equation, we can find the frequency by rearranging the equation as,

ν = $ \frac{E}{h} = $ \frac{6.8 \times 10^{-19}}{6.626\times10^{-34}} = 1.03\times10^{15} s^{-1}

Now the frequency and the wavelength are in inverse relationship with each other.

ν × λ = c

It can be rearranged to get λ as,

λ = c / ν

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So wavelength is 2.9 × 10⁻⁷ m.

6 0
3 years ago
Unstable isotopes undergo radioactive decay. what occurs during radioactive decay?
mel-nik [20]
Here is what radioactive decay is:
<span>Radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus. Remember that a radioisotope has unstable nuclei that does not have enough binding energy to hold the nucleus together.</span>
5 0
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Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. It is often called the
Serggg [28]

Answer:

Explanation:

In this case the answer would be

Water is a polar molecule with positive and negative side

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6 0
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Answer:

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Explanation:

5 0
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Instruction
MrRa [10]

Answer:

An object at position A. has all potential energy

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Explanation:

I already did it and got all of them correct. I hope this helped!! :)

5 0
3 years ago
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