Answer:
Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7
Explanation:
Number of electrons = 27
The closest noble gas before cobalt is Argon and argon has 18 electrons.
Co = [Ar] ; Remains 27 - 18 = 9 more electrons to fill.
The next orbital in order of increasing energy is the 4s orbital. However it can only hold a maximum of 2 electrons.
We have;
Co = [Ar] 4s2; Remains 27 - 20 = 7 more electrons to fill.
The next orbital in order of increasing energy is the 3d orbital. It can have a maximum of 10 electrons.
So we have;
Co = [Ar] 4s2 3d7
The electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6
This means the entire configuration of cobalt is;
Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7
Answer:
Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Explanation:
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Answer:
https://swartzbiotechnologylab.sites.stanford.edu/research
Explanation:
Answer:
<h2>6.48 </h2>
Explanation:
The pH of a solution can be found by using the formula
![pH = - log ([ {H}^{+} ])](https://tex.z-dn.net/?f=pH%20%3D%20-%20log%20%28%5B%20%7BH%7D%5E%7B%2B%7D%20%5D%29)
From the question we have

We have the final answer as
<h3>6.48 </h3>
Hope this helps you