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lukranit [14]
3 years ago
15

Use the following MO diagram for Be2, Be2+, and Be2-. Based on this diagram,

Chemistry
2 answers:
Marta_Voda [28]3 years ago
6 0
Bond Order = [Σ (bonding e-) - Σ (antibonding e-)]/2 
<span>Be2 = 4e = σ1(2e) σ2*(2e) σ3(0) π1(0) π2*(0) σ4*(0) bo = 0 </span>
<span>[Be2]+ = 3e = σ1(2e) σ2*(1e) σ3(0) π1(0) π2*(0) σ4*(0) bo = 0.5 </span>
<span>[Be2]+ would be more likely to exist since it has a bond order of 0.5 whereas Be2 has zero bond order</span>
Fantom [35]3 years ago
4 0

Answer:

Be2+ and Be2- are both more stable than Be2

Explanation:

Beryllium is the first element of Group 2 and. This means that it has 2 electrons in its last layer.

An atom is more stable when its outer shell of electrons is full, as in the case of noble gases.

So, Beryllium would become stable if it had the last complete electronic layer ridding itself of the two electrons of the second layer.

This means that the beryllium oxidation number is +2, because the 2 valence electrons (electrons of the last layer) are gone, leaving only the two in the inner layer. This is represented by Be + 2. And since the inner layer is complete, you can say that Be + 2 is more stable than Be.

A particular case of stability occurs when the layer is half full. This is the case of Be-2. If Be receives 2 electrons, you get Be2-. Now the anion has 2 electrons in the inner layer and 4 valence electrons in the second layer. As the completely filled layer would have 8 electrons; You can see that in this case it has half (8/2 = 4). That is a half-filled shell, so Be2- is also more stable than just Be.

So, based on what was said above, you can say that Be2+ and Be2- are both more stable than Be2

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MnO _{4}  ^{-}  + 5Fe ^{2+} + 8 H ^{+} ----\ \textgreater \  Mn ^{2+} + 5 Fe^{3+} + 4 H _{2}O.
6 0
3 years ago
which one of these is caused by gravity? A. frost wedging. B. mass wasting. C. Aeolian bands. D. Glaciation
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If the half-life of hydrogen-3 is 11.8 years, after two half-lives the radioactivity of a sample will be reduced to one-half of
maw [93]

Answer:

False

Explanation:

Half life is the time period at which the concentration of the radioactive substance in decay reduced to half.

<u>Thus, if the hydrogen-3 has gone 2 half lives, it means that it has first reduced to its half and then again the half of what it was, i.e. 1/4</u>

Thus, after two successive half-lives, the concentration must be 1/4 of the initial concentration and hence, the statement is false.

4 0
3 years ago
If 75 grams of oxygen react, how many grams of aluminum are required?
german

Answer:

84.24 g

Explanation:

Given data:

Mass of oxygen = 75 g

Mass of Al required to react = ?

Solution:

Chemical equation:

4Al + 3O₂     →   2Al₂O₃

Number of moles of oxygen:

Number of moles = mass/ molar mass

Number of moles = 75 g/ 32 g/mol

Number of moles = 2.34 mol

Now we will compare the moles of oxygen with Al.

                          O₂         :          Al

                           3          :             4

                        2.34        :         4/3×2.34 = 3.12 mol

Mass of Al required:

Mass = number of moles × molar mass

Mass = 3.12 mol × 27 g/mol

Mass = 84.24 g

5 0
3 years ago
Please help i am striggling with science so bad
Dennis_Churaev [7]

well, yes it will continue to swing but not forever. it will just a long time but eventually stop. the reason is because of the air resistance which will continue to damp the motion until the bob stops

3 0
3 years ago
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