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ahrayia [7]
3 years ago
8

Why is Mendeleev's suggestions best accepted in the construction of the periodic table​

Chemistry
1 answer:
crimeas [40]3 years ago
8 0
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Featured snippet from the web
Mendeleev's periodic table became widely accepted because it correctly predicted the properties of elements that had not yet been discovered.
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What is the energy released in this β − β − nuclear reaction 40 19 K → 40 20 C a + 0 − 1 e 19 40 K → 20 40 C a + − 1 0 e ? (The
Effectus [21]

<u>Answer:</u> The energy released in the given nuclear reaction is 1.3106 MeV.

<u>Explanation:</u>

For the given nuclear reaction:

_{19}^{40}\textrm{K}\rightarrow _{20}^{40}\textrm{Ca}+_{-1}^{0}\textrm{e}

We are given:

Mass of _{19}^{40}\textrm{K} = 39.963998 u

Mass of _{20}^{40}\textrm{Ca} = 39.962591 u

To calculate the mass defect, we use the equation:

\Delta m=\text{Mass of reactants}-\text{Mass of products}

Putting values in above equation, we get:

\Delta m=(39.963998-39.962591)=0.001407u

To calculate the energy released, we use the equation:

E=\Delta mc^2\\E=(0.001407u)\times c^2

E=(0.001407u)\times (931.5MeV)    (Conversion factor:  1u=931.5MeV/c^2  )

E=1.3106MeV

Hence, the energy released in the given nuclear reaction is 1.3106 MeV.

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2 years ago
Please For a brainlist and +10 points
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What element makes protein different from carbohydrate and fat? select one:
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D........... Nitrogen
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3 years ago
Which color of light has the greatest energy
ozzi

Answer:

violet

Explanation:

Waves with a short wavelength have the most energy. Red waves have a relatively long wavelength (in the 700 nm range), and violet waves are much shorter - roughly half that. Because violet waves have the shortest wavelength of the visible light spectrum, they carry the most energy (google)

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Definition: This is an acid that does not dissociate 100% into its ions. HA&lt;-&gt; H+ + A-
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Explanation: I took this on USATESTPREP.

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