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3 years ago

What would be the electron configuration of Copper (Cu)?

Chemistry

1 answer:

masya89 [10]3 years ago

7 0

Explanation:

In order to write the Copper electron configuration we first need to know the number of electrons for the Cu atom (there are 29 electrons). Once we have the configuration for Cu, the ions are simple. When we write the configuration we'll put all 29 electrons in orbitals around the nucleus of the Copper atom.

Therefore the expected electron configuration for Copper will be 1s22s22p63s23p64s23d9.

Half-filled and fully filled subshell have got extra stability. For the Cu+ ion we remove one electron from 4s1 leaving us with: 1s22s22p63s23p63d10.

For the Cu2+ ion we remove a total of two electrons (one from the 4s1 and one form the 3d10) leaving us with 1s22s22p63s23p63d9

Therefore, 1s22s22p63s23p63d9.

Hope this helps. Also note that copper is an exception to the rules for writing electron configurations.

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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl(aq) , as described b

Nostrana [21]

Answer:

0.676 grams of manganese (IV) oxide should be added.

Explanation:

Moles of chlorine gas = n

Volume of the chlorine gas = V = 205 mL = 0.205 L

Pressure of the chlorine gas = 705 Torr = $\frac{705}{760}atm=0.928 atm$

1 atm = 760 Torr

Temperature of the chlorine gas = T = 25°C = 25 + 273 K = 298 K

$PV=nRT$ ( ideal gs equation)

$n=\frac{PV}{RT}=\frac{0.928 atm\times 0.205 L}{0.0821 atm L/mol K\times 298 K}=0.00777 mol$

$MnO_2(s)+4HCl(aq)\rightarrow MnCl_2(aq)+2H_2O(l)+Cl_2(g)$

According to reaction, 1 mole of chlorine gas is obtained from 1 mole of manganese(IV) oxide,then 0.00777 moles of chlorine gas will be obtained from :

$\frac{1}{1}\times 0.00777 mol=0.00777 mol$ of manganese (IV) oxide

Mass of 0.00777 moles of manganese (IV) oxide:

0.00777 mol × 87 g/mol = 0.676 g

0.676 grams of manganese (IV) oxide should be added.

3 0

3 years ago

During mitosis, this structure moves individual chromosomes?

stiv31 [10]

Answer:

Anaphase

Explanation:

Two separate classes of movements occur during anaphase. During the first part of anaphase, the kinetochore microtubules shorten, and the chromosomes move toward the spindle poles. During the second part of anaphase, the spindle poles separate as the non-kinetochore microtubules move past each other.

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3 years ago

What characteristic odor would you expect to observe if an alcohol reacted with acidified ethanoic acid?

vovikov84 [41]

A vinegar-like smell would be the answer

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When a sky diver jumps out of a plane, the speed at which he or she falls to the ground continues to increase. What force is res

never [62]

Gravity is pulling the skydiver down therefore gravitational force

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4 years ago