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ryzh [129]
4 years ago
6

If you build an atom using two protons two neutrons and two electrons you have built an atom of

Chemistry
1 answer:
zalisa [80]4 years ago
5 0

Helium atom because two of everything is a helium

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Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck's constant is 6.626 x 10-34 jou
UNO [17]

9.01 × 10⁻²⁶ J

<h3>Explanation</h3>

ΔE = h · f

Where

  • ΔE the change in energy,
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However, only λ is given.

f = c / λ

Where

  • f frequency of the emission,
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For this emission:

f = 2.998 × 10⁸ / 2.21 = 1.36 × 10⁸ s⁻¹.

ΔE = h · f = 6.626 × 10⁻³⁴ × 1.36 × 10⁸ = 9.01 × 10⁻²⁶ J

5 0
3 years ago
How many Electrons make up 1 Proton
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<span> the answer is that you need 1836 </span>electron<span> to equal the mass of a </span>proton<span>.</span>
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The chain reaction in nuclear reactors requires the absorption of neutrons in order to maintain control of the reaction.
julsineya [31]
The answer is true hope this helps

7 0
3 years ago
What is the bond between a posative and a negative ion called
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Answer:

Your answer would be Ionic bond.

5 0
3 years ago
A student makes a mistake while preparing a vitamin C sample for titration and adds the potassium iodide solution twice. How wil
LiRa [457]

The added KI does not have any impact  

The reaction invovles Titration of vitaminc ( Ascorbic acid)

ascorbic acid + I₂ → 2 I⁻  +  dehydroascorbic acid

the excess iodine is free reacts with the starch  indicator, forming the blue-black starch-iodine complex.  

This is the endpoint of the titration. since alreay excess KI is added ( the source of Iodine), it does not have an influence.

Answer B

Hope this helps!

5 0
4 years ago
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