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svetlana [45]
3 years ago
6

How could having a knowledge of density be useful in everyday life 

Chemistry
2 answers:
MA_775_DIABLO [31]3 years ago
6 0
Most people cook everyday you use a measuring cup to measure liquids and solids or powders. You use density when filling a glass of water if your dehydrated which glass do you choose the large cup or the small cup.
aleksklad [387]3 years ago
5 0
Density is found in everyday objects.
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If an atom has three shell and number of valence electrons are two. Is this element metal
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Answer:

Metal

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Explanation:

To find the element, let's use the periodic table. (Look below)

We already went past 3 shells, just need the 2 electrons after it.

Just skip to the 4th row and count 2 to the right

We end up at Calcium.

Calcium is a metal and we're also on the alkaline earth metals column.

Calcium will need to lose 2 electrons to reach stability, so the valency is 2.

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Pauli exclusion principle states that electrons which are identical cannot have the same quantum state.

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What are the oxidation numbers of the atoms in this reaction?
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