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Licemer1 [7]
3 years ago
15

1. Use electron dot formulas to predict the formulas of the ionic compounds formed from the

Chemistry
2 answers:
masha68 [24]3 years ago
7 0

Answer:

sorry I'm in a hurry

plz will u thank me for this much

Mkey [24]3 years ago
5 0

Answer:

a) Bes

b) KF

c) MgO

d) H2S

e) AlCl3

f) NaI

g) SrSe

h) Ga2O3

Explanation:

In the picture attached the electron dot representation of different elements is shown.

a) From the picture it an be seen that Beryllium has 2 valence electrons, to form a ionic compound it will lost them and transforms into Be^{2+}

Sulfur has 6 valence electrons, to form a ionic compound it will gain 2 electrons (to complete 8 electrons in its outer shell) and transforms into S^{2-}

The ionic compounds are electrically neutral, so the charge combination of its ions must be zero. If we combine 1 Be^{2+} cation with 1 S^{2-} anion the net charge will be: +2 + (-2) = 0. Then the formula is BeS.

The other cases are solved analogously.

b)

potassium cation: K^{+}

fluorine anion: F^{-}

compound formula: KF (net charge: +1 + (-1) = 0)

c)

magnesium cation: Mg^{2+}

oxygen anion: O^{2-}

compound formula: MgO (net charge: +2 + (-2) = 0)

d)  hydrogen and sulfur don't make an ionic compound, they form hydrogen sulfide which is a covalent compound

e) aluminum and chlorine form AlCl3, which is covalent.

f)

sodium cation: Na^{+}

iodine anion: I^{-}

compound formula: NaI (net charge: +1 + (-1) = 0)

g)

strontium cation: Sr^{2+}

selenium anion: Se^{2-}

compound formula: SrSe (net charge: +2 + (-2) = 0)

h)

gallium cation: Ga^{3+}

oxygen anion: O^{2-}

compound formula: Ga2O3 (net charge: 2*(+3) + 3*(-2) = 0)

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#1. An element or ion that has lost two electrons must have a net charge of 2+, because it has two more protons than electrons, therefore the answer is Mg2+

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