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tester [92]
3 years ago
12

Determine the identity of the daughter nuclide from the electron capture by 3517cl. determine the identity of the daughter nucli

de from the electron capture by . 4019k 3218ar 3516s 3215p 3718ar
Chemistry
1 answer:
brilliants [131]3 years ago
4 0

Answer:

  •           ^{35}_{16}S

Explanation:

When the nucleus of an <em>atom captures and electron</em>, such electron combines with a proton and forms a neutron. Thus, the mass number remains the same (just a proton has been converted into a neutron) but the atomic number (the number of protons) decrease in one.

Then, the daughter nuclide will have the same mass number and the atomic number reduced in one.

The given parent isotope is    ^{35}_{17}Cl,    which means that it has these features:

  • Chemical symbol: Cl
  • Name of the element: chlorine
  •  Mass number (the superscript to the left): 35
  •  Atomic number (the subscript to the left): 17

And the daughter nuclide after the electron capture will be:

  • Mass number: 35 (the same of the parent nuclide)
  • Atomic number: 17 - 1 = 16
  • Identity: sulfur (search the element with atomic number 16 in a periodic table).
  • Chemical symbol: S

  • Idenity of the daughter nuclide using the isotope notation:

          ^{35}_{16}S

Hence, the answer is the third choice.

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How many hydrogen atoms are in 35.0 grams of hydrogen gas? How many hydrogen atoms are in 35.0 grams of hydrogen gas? 4.25 × 102
Ede4ka [16]

Answer: 2.12\times 10^{25} atoms of hydrogen are there in

35.0 grams of hydrogen gas.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}=\frac{35.0g}{2g/mol}=17.5moles

1 mole of hydrogen (H_2) = 2\times 6.023\times 10^{23}=12.05\times 10^{23} atoms

17.5 mole of hydrogen (H_2) = \frac{12.05\times 10^{23}}{1}\times 17.5=2.12\times 10^{25} atoms

There are 2.12\times 10^{25} atoms of hydrogen are there in

35.0 grams of hydrogen gas.

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Explanation:

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If a frog initially contained 2 grams of carbon-14 and the half-life of carbon-14 is 5,730 years, how much carbon-14 remains in
andreyandreev [35.5K]
Half life is the time taken for a radioactive isotope to decay by half its original mass. In this case the half life of carbon-14 is 5.730 years. 
Using the formula;
New mass = original mass × (1/2)^n; where n is the number of half lives (in this case n=1 ) 
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