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sveticcg [70]
2 years ago
12

Why do elements in the same colum have similar properties?

Chemistry
1 answer:
den301095 [7]2 years ago
6 0

Answer:because they have the same number of valence electrons

Explanation:

Valence electrons determine reactivity.

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A chemist found that 4.69 g of sulfur combined with fluorine to produce 15.81 g of a gas. what is the empirical formula of the g
timofeeve [1]
Mass of sulfur combined - 4.69 g
Mass of gas produced is 15.81 g, therefore mass of fluorine is (15.81-4.69) = 11.12 g
Number of sulfur moles - 4.69 g/32 g/mol = 0.15 mol
Number of fluorine moles - 11.12 g/ 19 g/mol = 0.585 mol
divide both by least number of moles 
S - 0.15/0.15 = 1
F - 0.585/0.15 = 3.9 rounded off is 4
ratio of S to F = 1:4Therefore formula of the gas is SF₄
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3 years ago
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All synthetic elements...
ki77a [65]
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A substance can change into a new kind of molecule when:
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