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The valence of aluminum is +3, and the valence of chlorine is -1. The formula for aluminum chloride is correctly written as:

A. [tex]Al_3Cl[/tex]

B. [tex]Cl_3Al[/tex]

C. [tex]ClAl_3[/tex]

D. [tex]AlCl_3[/tex]

Sagot :

GinnyAnsweridn
To determine the correct formula for aluminum chloride, we need to balance the charges of the elements involved. Let's analyze the valences:

1. Aluminum (Al) has a valence of +3.
2. Chlorine (Cl) has a valence of -1.

For the compound to be electrically neutral, the total positive charge must balance the total negative charge.

- One aluminum atom has a charge of +3.
- One chlorine atom has a charge of -1.

To balance the charges:
- We need three chlorine atoms to balance the +3 charge from one aluminum atom. This is because 3 chlorine atoms, each with a charge of -1, will provide a total charge of -3, which will balance the +3 charge from aluminum.

Therefore, the correct chemical formula for aluminum chloride is [tex]$AlCl_3$[/tex].

The correct answer is:
D. [tex]$AlCl_3$[/tex].
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