Scandium, 44 is over 21sc, decays by emitting a positron. what is the nuclide that is the product of the decay? group of answer
1 answer:
Emitting a positron (e+) means the atomic number of product nuclei decreased by one, with the same mass number.
Atomic number 20 is of Calcium, so .
So, 44Ca₂₂
<h3>What is nuclear decay?</h3>The process through which an unstable atomic nucleus loses energy through radiation is known as radioactive decay, also known as nuclear decay, radioactivity, radioactive disintegration, or nuclear disintegration. A substance that has unstable nuclei is regarded as radioactive. Alpha decay, beta decay, and gamma decay are three of the most frequent kinds of decay, and they all entail the emission of one or more particles. Beta decay is governed by the weak force, whereas the nuclear force and electromagnetism are in charge of the other two. Electron capture is a fourth type of common decay in which an unstable nucleus seizes an inner electron from one of the electron shells.
Discrete X-rays are released from the transitions as a result of the loss of that electron from the shell, which causes a cascade of other electrons to fall into the lower shell. Iodine-125, which is frequently utilized in medical contexts, is an example.
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Answer: noble gasses
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Answer: The balanced equation for the given reaction is
.
Explanation:
A chemical equation which contains same number of atoms on both reactant and product side.
For example,
Here, number of atoms on reactant side are as follows.
- S = 1
- O = 4
Number of atoms on product side are as follows.
- S = 1
- O = 3
To balance this equation, multiply by 2 on reactant side and multiply
by 2. Hence, the equation will be re-written as follows.
Here, number of atoms on reactant side are as follows.
- S = 2
- O = 6
Number of atoms on product side are as follows.
- S = 2
- O = 6
Now, there are same number of atoms on both reactant and product side. So, this equation is balanced.
Thus, we can conclude that the balanced equation for the given reaction is .
0.012moldm⁻³
Explanation:
Given parameters:
Mass of AgNO₃ = 1000mg
Volume of water = 500mL
Unknown:
Molarity of solution = ?
Solution:
The molarity of a solution is the number of moles of a solute dissolved in volume of solvent.
Molarity =
Number of moles of AgNO₃ = ?
Number of moles =
Molar mass of AgNO₃ = 108 + 14 + 3(16) = 170g/mol
convert mass to g;
1000mg = 1g
Number of moles = = 0.00588moles
convert the given volume to dm³;
1000mL = 1dm³;
500mL = 0.5dm³
Now solve;
Molarity = = 0.012moldm⁻³
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