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Ahat [919]
3 years ago
10

At room temp attire a mixture of sand and water can be separated by

Chemistry
1 answer:
Elza [17]3 years ago
8 0
Sand and water can be separated by filtration using a filter funnel and to get pure water it can be distilled.
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The number of electrons in n=1 and n=2 shells of aluminum are
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Answer:

n=1 holds two electrons and n=2 holds eight electrons.

Explanation:

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In this case, since the atomic number of aluminum is 13, its electron configuration is:

Al^{13}: 1s^2,2s^2,2p^6,3s^2,3p^1

In such a way, we can see that the level n=1 is filled with two electrons since the subshell s is able to hold two electrons and the level n=2 is also filled but with eight electrons as s holds two whereas p holds 6. Moreover, n=3 is holding three electrons.

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