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irina [24]
3 years ago
10

What is the electron configuration of the element with 27 protons?

Chemistry
2 answers:
adelina 88 [10]3 years ago
7 0
<span>The electronic configuration of cobalt is :1s2 2s2 2p6 3s2 3p6 3d7 4s2 </span>
Pavel [41]3 years ago
5 0

Answer: Co:27:1s^22s^22p^63s^23p^64s^23d^7

Explanation: A neutral element with 27 protons will have 27 electrons and thus has a atomic number of 27. The element with atomic number 27 is cobalt and the nearest noble gas is argon with 18 electrons.

The electrons are filled according to Afbau's rule in order of increasing energies.

Co:27:1s^22s^22p^63s^23p^64s^23d^7

The electronic configuration in terms of noble gs configuration is:  

Co:27:[Ar]4s^23d^7

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I like that game Forza horizon

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Dmitry [639]

Answer:

1.39

Explanation:

[Hg2Cl2]= 1M

[H^+] = ????

E°cell= 0.35V

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Therefore E for the reaction must -0.082 V

n= 2 moles of electrons

From Nernst Equation:

E= E°cell- 0.0592/n log [Red]/[Ox]

0.0268= 0.35- 0.0592/2 log 1/[Ox]^2

-0.082= -0.0296 log 1/[Ox]^2

log 1/[Ox]^2= 0.082/0.0296

log 1/[Ox]^2= 2.77

1/[Ox]^2=Antilog (2.77)

[Ox]^2=1.698×10^-3

[Ox] = 0.0412 M

But pH= -log [H^+]= -log(0.0412)= 1.385

3 0
3 years ago
Read 2 more answers
Which statement is true?
docker41 [41]
I am pretty sure that the statement which is true is A. a molecule having a covalent bond can be ionic. I choose this option because you usually ca see how electons of polyatomic ions are being covalenr and gain or loose ionic electrons in order to accomplish the octet.<span>

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A phosphorus atom and a chlorine atom are likely to form a covalent bond because both elements:
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So, if an object had a mass of 100 grams and a volume of 100 milliliters, the density would be 100 grams / 100 ml.

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