Why do some atoms form positive ions and others form negative ions?

1 answer:

6 0

Atoms for negative or positive ions depending on whether they lose or gain electrons to achieve the stable octet. If an atom loses electrons then it would have a positive charge (cation) and if the atom gains electrons then it would become negatively charged (anion).

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Explain why the place of aluminum in the reactivity wagon seems to be unsuitable.

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Answer:

Acids react with most metals.

When an acid reacts with a metal, the products are a salt and hydrogen.

This is the general word equation for the reaction: metal + acid → salt + hydrogen

Explanation:

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Atoms full valence electron shells are chemically stable. Most noble gases have eight valence electrons. So, one bottle for chem

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Gain or lose.
The exchange of electrons in chemical bonding seeks to fulfill the octet rule. There are some exceptions, such as with hydrogen and helium, whose valence shells have a capacity of two electrons.

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A 44.0 g sample of an unknown metal at 99.0 oC was placed in a constant-pressure calorimeter of negligible heat capacity contain

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Answer:

$C_m=0.474\frac{J}{g\°C}$

Explanation:

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In this case, since this is a system in which the water is heated up and the metal is cooled down in a calorimeter which is not affected by the heat lose-gain process, we can infer that the heat lost by the metal is gained be water, it means that we can write:

$Q_m=-Q_w$