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melamori03 [73]
3 years ago
12

When two protons and two neutrons combine to form 4He, it is found that this helium nucleus is less massive than the sum of the

four original particles used to construct it. What is the significance of this?
Chemistry
1 answer:
Fynjy0 [20]3 years ago
3 0

Answer:

Explanation:

This signifies a defect in mass. The phenomenon is known as mass defect. Mass defect is compares the mass of an isotope to that of the nucleons in the nucleus.

The mass defect implies the energy that was given off when the protons and neutrons combine to form the new helium atom. The mass defect helps us to understand why the mass of an atom might not eventually correspond to what we obtain theoretically by calculation.

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Classify the following statements regarding the law of mass conservation as true or false.
Ahat [919]
True true false true
8 0
4 years ago
What is the density of 0.50 grams of gaseous carbon stored under 1.5 atm of pressure at a temperature of -20.0 C?
Fantom [35]

it has a density 6.50, hope it help

3 0
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When determining the mass of product used or reactant consumed, the number of moles must be determined before comparing two subs
FromTheMoon [43]

Answer:

moles react.

Explanation:

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In solving stoichiometric problems, it is mandatory to use moles as a conversion factor in calculating the mass of product formed or the mass of reactant consumed. We often read off the number of moles that reacted from the balanced reaction equation and then convert the reacting mass of species given to the number of moles of that specie that actually participated in the reaction in order to obtain any required information from a reaction.

7 0
4 years ago
Read 2 more answers
Bohr’s atomic model (3pts) (A) proposes that electrons occupy specific energy levels (B) explains the emission spectra of hydrog
r-ruslan [8.4K]

Answer:

Correct option: D (both A and B)

Explanation:

Key things of bohr's model is that electrons occupy fixed orbital and required fixed amount of energy and electron must be in specific orbital and have precise amount of energy for that orbit

Niels bohr proposed a hydrogen atom model  which explains the spectrum of hydrogen and he assumed that electron of hydrogen revolves around the nucleus in the circular orbit and bohr's model is valid only for single electron species.

statement of option A and B are correct

hence D is correct

4 0
4 years ago
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
laila [671]
The Energy of an atom that emits a photon of wavelength 2.21 m is 3.028 × 10⁻¹⁹ J.
I attached the working and the answer to the question below. I hope I was able to help.
Please note that C = speed of light, ν = frequency, λ= wavelength, h = Planck's Constant

7 0
3 years ago
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