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Talja [164]
3 years ago
13

HELP ME PLZ!!! I really dont know this!!! What characteristic of metals makes them good electrical conductors? -They have mobile

protons. -They have mobile valence electrons. -Their crystal structures can be rearranged easily. -They have mobile cations.
Chemistry
1 answer:
Natasha2012 [34]3 years ago
6 0

Answer:

To have a high electrical conductivity, a normal metal should have mobile valence electrons and a long electron mean free path.

Explanation:

A long mean free path means that the electron goes a long distance between scattering events.

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tritium and deuterium are combined and result in the formation of helium

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How many grams of o2 are required to produce 358.5 grams of zno? 2zn + o2 ® 2zno?
Murrr4er [49]
The balanced equation for the reaction is ;
2Zn + O2 —> 2ZnO
The stoichiometry of O2 to ZnO is 1:2
The mass of ZnO formed - 358.5 g
The number of moles formed - 358.5 g / 81.4 g/mol = 4.4 moles
Therefore number of O2 moles reacted = 4.4 moles /2 = 2.2 mol
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3 years ago
How many moles are equal to 2.188E+23 atoms of iron?
rusak2 [61]
<span>2.188*10^23 atoms of iron
6.022*10^23 atoms/mole
(2.188*10^23 atoms of iron)/(6.022*10^23 atoms/mol)~.3633 moles of iron

Hope this helps!</span>
7 0
3 years ago
How many electrons would be in a calcium cation with a positive 2 charge?
kondor19780726 [428]

Number of electrons in a Ca²⁺ = 18

<h3>Further explanation  </h3>

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub shell uses the following sequence:  

<em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  </em>

The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20

Electron configuration of Ca : <em>1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²</em>

When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:

\tt 20-2 = 18

and the electron configuration (Ca²⁺ ) becomes:

<em>1s², 2s², 2p⁶, 3s², 3p⁶</em>

<em />

6 0
2 years ago
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