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pshichka [43]
3 years ago
11

For the n = 3 electron shell, which of the following quantum numbers are valid? Check all that apply.

Chemistry
2 answers:
GenaCL600 [577]3 years ago
7 0
Since l can be 0,1,2... up to n-1 and m can be -l, -l+1... up to l, I say this

l=0, m=2, m=-2. It's worth saying that these equalities can not be simultaneous, but they are possible for the shell n=3 separately
cluponka [151]3 years ago
3 0

Answer : The correct options are, l=0,m=-2\text{ and }m=2

Explanation :

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic Quantum Number : It describes the orientation of the orbitals. It is represented as m_l. The value of this quantum number ranges from (-l\text{ to }+l). When l = 2, the value of m_l will be -2, -1, 0, +1, +2.

Spin Quantum number : It describes the direction of electron spin. This is represented as m_s The value of this is +\frac{1}{2} for upward spin and -\frac{1}{2} for downward spin.

As we are given that,  n=3

So,

l=0,1,2

m_l=-2,-1,0,1,2

m_s=+\frac{1}{2}\text{ and }-\frac{1}{2} (For each sub-shell)

Hence, from this we conclude that, the valid quantum numbers are l=0,m=-2\text{ and }m=2

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Explanation:

In order to solve the problem, you have to know the formula for "Density." Density refers to<em> </em><em>"mass per unit volume." </em><em>It's formula is:</em>

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Next, we have to convert the units of measurement in accordance to what is being asked in the problem. It is asking for "g/mL," which means we have to convert 1.25 quarts<em> (qt.) </em>to mL and 2.25 pounds<em> (lbs.)</em> to grams.

Let's solve.

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2.25 pounds x \frac{453.592 grams}{1 pound} = <em>1,020.58 grams</em>

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<em>The density of the motor oil is 0.86 g/mL</em>

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