What type of radiation is emitted when polonium-212 forms lead-208?a. an alpha particle
b. a beta particle
c. gamma radiation
d. all of the above

Answers

Answer 1

Answer:

Answer: The radiation that is emitted from the above process is alpha particle.

Explanation:

Alpha decay is defined as the process in which alpha particle is emitted. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units. The released alpha particle is also known as helium nucleus.

$_Z^A\textrm{X}\rightarrow _(Z-2)^(A-4)\textrm{Y}+_2^4\alpha$

Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron. The released beta particle is also known as electron.

$_Z^A\textrm{X}\rightarrow _(Z+1)^A\textrm{Y}+_(-1)^0\beta$

Gamma decay is defined as the process in which an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and thus releases $\gamma -radiations$ .

These radiations does not carry any charge and are electrically neutral.

$_Z^A\textrm{X}^*\rightarrow _Z^A\textrm{X}+_0^0\gamma$

The chemical equation for the decay of polonium-212 isotope follows:

$_(84)^(212)\textrm{Po}\rightarrow _(82)^(208)\textrm{Pb}+_2^4\alpha$

Hence, the radiation that is emitted from the above process is alpha particle.

Answer 2

Answer: A. An alpha particle.

Hope this helps :) ~

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To make a 2.0-mole solution, how many moles of solute must be dissolved in 0.50 liters of solution?0.25 moles solute

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Answers

To make a 2.0-molarity solution in 0.50 liters of solution
M = moles of solute / liter solution
2 molarity = moles of solute / 0.5 liters of solution
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Answer : The correct option is, 1.0 mole

Explanation : Given,

Molarity of solution = 2.0 mole/L

Volume of solution = 0.50 L

Molarity : It is defined as the number of moles of solute present in one liter of solution.

Formula used :

$Molarity=\frac{\text{Moles of solute}}{\text{Volume of solution}}$

Now put all the given values in the above formula, we get the moles of the solute.

$2.0mole/L=\frac{\text{Moles of solute}}{0.50L}$

$\text{Moles of solute}=1.0mole$

Therefore, the number of moles of solute dissolved in the solution will be, 1.0 mole

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Answers

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Answers

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Answers

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1. A tuning fork has a frequency of 280 hertz, and the wavelength of the sound produced is 1.5 meters. Calculate the velocity of the wave. - Answer:
2. A wave is moving toward shore with a velocity of 5.0 m/s. If its frequency is 2.5 hertz, what is the wavelength?
- Answer:
3. A jump rope is shaken producing a wave with a wavelength of 0.5 m. with the crest of the wave passing a certain point 7 times per second. What is the velocity of the wave?
- Answer:
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- Answer:
5. A microwave has a frequency of 4,255 Hz. and a wavelength of 0.05 m. What is the microwave’s velocity?
- Answer:
6. A sound wave travels with a velocity of 460 m/s and has a frequency of 820 Hz. What is its wavelength?
- Answer:
7. A wave at sea travels with a velocity of 32 m/s. If it has a wavelength of 8 m. what is its frequency?
- Answer:
8. What is the frequency of a wave that has a velocity of 21.3 m/s and a wavelength of 7.8 m?
- Answer:

Answers

Based on the calculation, the velocity of this wave is equal to 420 m/s.

Given the following data:

Frequency of turning fork = 280 hertz.

Wavelength of sound produced = 1.5 meters.

How to calculate the velocity of a wave?

Mathematically, the velocity of a wave is calculated by using this formula:

V = λF

Where:

F is the frequency of a wave.

V is the velocity of a wave.

λ is the wavelength of a wave.

Substituting the given parameters into the formula, we have;

V = 1.5 × 280

V = 420 m/s.

Note: You should use the above formula to solve the other questions.

Read more on frequency here: brainly.com/question/19250621

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velocity = frequency x wavelength. 1) v = 280 x 1.5 = 420m/s 2) w = v / f = 5 / 2.5 = 2m

Which best explains why nuclear reactions release more energy than chemical reactions?The forces holding the nucleus together are much stronger than the forces binding electrons to atoms.
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Answers

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Answer:

the asnwer i know for a fact is between A and C but its A

Explanation:

we know B and D are wrong for sure so its left in between A and C but

A its the one that make sense most : )

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