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iVinArrow [24]
3 years ago
12

An atom’s lewis dot structure has two dots, which element could it be, and why?

Chemistry
1 answer:
Neko [114]3 years ago
5 0
It could be any of the alkaline metals or helium as they all have 2 valence electrons.
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Calculate the number of atoms of sodium in a 4.5-gram sample
allochka39001 [22]

Answer:

1.18×10²³ atoms.

Explanation:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ atoms.

From the above concept, 1 mole of sodium also contains 6.02×10²³ atoms.

1 mole of sodium = 23 g.

Thus,

23 g of sodium contains 6.02×10²³ atoms.

Therefore, 4.5 g of sodium will contain = (4.5 × 6.02×10²³)/23 = 1.18×10²³ atoms.

From the above calculation,

4.5 g of sodium contains 1.18×10²³ atoms.

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Answer:

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jenyasd209 [6]
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