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photoshop1234 [79]
3 years ago
10

Which is the electron configuration for bromine?

Chemistry
1 answer:
murzikaleks [220]3 years ago
3 0

Answer:

The first one

Explanation:

I can't read them well: it should be 1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}

** this is the expanded version

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If a solution conducts electricity, it is positive evidence that
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If a solution conducts electricity, it is positive evidence that solute dissolved in solvent is electrolyte.

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Please help make sure its correct thanks
Wewaii [24]

The empirical formula of metal iodide : CoI₃(Cobalt(III) Iodide)

<h3>Further explanation</h3>

13.02 g sample of Cobalt , then mol Co(MW=58.933 g/mol) :

\tt mol=\dfrac{mass}{Ar}=\\\\mol=\dfrac{13.02~g}{58.933}\\\\mol=0.221

Mass of metal iodide formed : 97.12 g, so mass of Iodine :

\tt =mass~metal~iodide-mass~Cobalt\\\\=97.12-13.02\\\\=84.1~g

Then mol iodine (MW=126.9045 g/mol) :

\tt \dfrac{84.1}{126.9045}=0.663

mol ratio of Cobalt and Iodine in the compound :

\tt 0.221\div 0.663=1\div 3

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2 years ago
What was Johann Dobereiner’s contribution to the development of the periodic table?
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