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max2010maxim [7]
3 years ago
15

What is the difference/similarities between the periodic table developed by Mendeleev versus the one developed by Moseley?

Chemistry
2 answers:
otez555 [7]3 years ago
5 0

Answer:

C) Mosley arranged the elements in order of increasing atomic number  

Explanation:

Correct on Edge

kotegsom [21]3 years ago
3 0

Both designed a periodic table of elements- Mendeleev designed the first one in order of atomic mass and Moseley designed the modern one in order of atomic number. ... Isotope- Because of the notation and the 13 is not the atomic mass on the periodic table so it is the same element just a different form.

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Is the continental crust less dense or more dense ?
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What is the mass of 2.071x10^14 molecules of SF2
kolezko [41]

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Explanation:

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Carbon-14 has a half-life of 5,730 years. How long will it take for 112. 5 g of a 120. 0-g sample to decay radioactively? 5,730
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The time taken by Carbon-14 to decay radioactively from 120g to 112.5g is 22,920 years.

<h3>How do we calculate the total time of decay?</h3>

Time required for the whole radioactive decay of any substance will be calculated by using the below link:

T = (n)(t), where

  • t = half life time = 5730 years
  • n = number of half life required for the decay

Initial mass of Carbon-14 = 120g

Final mass of Carbon-14 = 112.5g

Left mass = 120 - 112 = 7.5g

Number of required half life for this will be:

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  • 2: 60 → 30
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4 half lives are required, now on putting values we get

T = (4)(5730) = 22,920 years

Hence required time for the decay is 22,920 years.

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2 years ago
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