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3 years ago

An isotope has the same number of _ but a different number of __than others atom of the same element

2 answers:

8 0

An isotope has the same number of protons but a different number of electrons than others atom of the same element

allochka39001 [22]3 years ago

4 0

Answer: protons

neutrons

Explanation: idk I am cheating as well

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A substance is examined under a high-power electron microscope. The substance is found to contain only one type of atom.

Zielflug [23.3K]

Answer:

It is a solution

Explanation:

I know that because a solution is something you mix and you have to use a microscope if you really wanna see what's in there

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3 years ago

Knowing how fossils form, do you think it’s likely that humans will ever piece together a complete fossil record for every speci

Virty [35]

Answer:

yes

Explanation:

since humans dig out the earth for resources o believe that fossils far every species that exists and is extinct will be found and will be pieced together

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3 years ago

Read 2 more answers

Hydrogen atoms absorb energy so that the electrons are excited to n=4. Calculate the wavelength, in

FromTheMoon [43]

Answer:

the wavelength, in nm, of the photon is 487.5 nm

Explanation:

Given:

n = 4 (excited)

n = 2 (relaxes)

Question: Calculate the wavelength, in nm, λ = ?

First, it is important to calculate the energy of the electron when it excited and then when it relaxes.

$E_{1} =\frac{-13.6}{n^{2} } =\frac{-13.6}{4^{2} } =-0.85eV$ (excited)

$E_{2} =\frac{-13.6}{2^{2} } =-3.4eV$ (relaxes)

The change of energy

ΔE = E₁ - E₂=-0.85 - (-3.4) = 2.55 eV = 4.08x10⁻¹⁹J

For a photon, the wavelength emitted

$\lambda =\frac{hc}{delta(E)}$

Here

h = Planck's constant = 6.63x10⁻³⁴J s

c = speed of light = 3x10⁸m/s

Substituting values:

$\lambda =\frac{6.63x10^{-34}*3x10^{8} }{4.08x10^{-19} } =4.875x10^{-7} m=487.5nm$

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3 years ago

What type of reaction is CuO + H2SO4 ➡️ CuSO4 + H2O

Afina-wow [57]

Water is the answer hope this helps

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3 years ago

Give the % composition for each element found in tin (IV) nitride.

drek231 [11]

32.3699% Tin (Sn)

15.2774% Nitrogen (N)

52.3527% Oxygen (O)

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3 years ago

An isotope has the same number of ___ but a different number of ____than others atom of the same element

An isotope has the same number of _ but a different number of __than others atom of the same element