3 years ago

What is the answer to this problem?

Chemistry

1 answer:

Helga [31]3 years ago

4 0

Ch2 yeah well I think

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Is the following true or false every element in the periodic table follows the aufbau principle

gulaghasi [49]

Answer:

True

Explanation:

It is true that every element in the periodic table follows the Aufbau's principle.

The principle states that "the sublevels with lower energies are filled up before those with higher energies".

Sublevels do not fill up in numerical order.
This is true when writing the electronic configuration of all atoms on the periodic table.

7 0

3 years ago

If aluminum is diffused into a thick slice of silicon with no previous aluminum in it at a temperature of 1100˚C for 8 hours, wh

RideAnS [48]

Answer:

8.354 nanometers

Explanation:

To treat a diffusive process in function of time and distance we need to solve 2nd Ficks Law. This a partial differential equation, with certain condition the solution looks like this:

$\frac{C_{s}-C{x}}{C_{s}-C_{o}}=erf(x/2\sqrt{D*t})$

Where Cs is the concentration in the surface of the solid

Cx is the concentration at certain deep X

Co is the initial concentration of solute in the solid

and erf is the error function

Then we solve right side,

$\frac{C_{s}-C{x}}{C_{s}-C_{o}}=\frac{1018atoms/cm3-1016atoms/cm3}{1018atoms/cm3}=0.001964$

And we need to look up the inverse error function of 0.001964 resulting in: 0.00174055

Then we solve for x:

$x=0.00174055*2*\sqrt{D*t} =0.00174055*2*\sqrt{2*10^{-12}cm^{2}/s*8h*3600s/h}=8.35464*10^{-7}cm$

6 0

3 years ago

What type of electrons are involved in chemical reactions?

sweet-ann [11.9K]

The outermost energy shell of an atom

because they are involved in forming bonds

7 0

3 years ago

The temperature in mark’s town is 30 degrees Fahrenheit. The temperature in Vikki’s town is 82 degrees Fahrenheit. In both towns

allochka39001 [22]

Answer:

sorry don't know the answer but i really need the points sorry

Explanation:

7 0

3 years ago

5 meters

Feliz [49]

Answer:

Explanation:

7 0

3 years ago