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nikitadnepr [17]
3 years ago
11

What formula should I use?

Physics
1 answer:
Elodia [21]3 years ago
7 0
These nuts on your chin
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Students are investigating the rocks with fossil markings that are found in an area that was once covered by a lake. The rocks t
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sedimentary rock

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Consider the addition of an electron to the following atoms from the fourth period. Rank the atoms in order from the most negati
Murrr4er [49]
Electron configurations:

Ge: [Ar] 3d10 4s2 4p2 => 6 electrons in the outer shell

Br: [Ar] 3d10 4s2 4p5 => 7 electrons in the outer shell

Kr: [Ar] 3d10 4s2 4p6 => 8 electrons in the outer shell

The electron affinity or propension to attract electrons is given by the electronic configuration. Remember that the most stable configuration is that were the last shell is full, i.e. it has 8 electrons.

The closer an atom is to reach the 8 electrons in the outer shell the bigger the electron affinity.

Of the three elements, Br needs only 1 electron to have 8 electrons in the outer shell, so it has the biggest electron affinity (the least negative).

Ge: needs 2 electrons to have 8 electrons in the outer shell, so it has a smaller (more negative) electron affinity than Br.

Kr, which is a noble gas, has 8 electrons and is not willing to attract more electrons at all, the it has the lowest (more negative) electron affinity of all three to the extension that really the ion is so unstable that it does not make sense to talk about a number for the electron affinity of this atom.




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3 years ago
Physical form in which a substance can exist 
Anika [276]
A solid, liquid, or gas or plasma. Which I think it is. Check though. 
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In one experiment the electric field is measured for points at distances r from a uniform line of charge that has charge per uni
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(a) A. Uniform line of charge and B. Uniformly charged sphere

(b) To three digits of precision:

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p = 2.81 * 10^-4 C/m^3

Explanation:

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