Multiple Choice
Which of the following species has the same number of electrons as Cl^-?
3
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2. Atoms & Elements
Ions
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How many ions with a +1 charge are required to bond with one ion that has a -2 charge to form a neutral compound?
A
3
B
1
C
2
D
4
Verified step by step guidance1
Identify the charges of the ions involved: one ion has a charge of -2, and the other ions have a charge of +1 each.
To form a neutral compound, the total positive charge must balance the total negative charge, so the sum of positive charges equals the sum of negative charges.
Set up an equation where the number of +1 ions is represented by \( x \). The total positive charge is then \( +1 \times x = x \), and the total negative charge is \( -2 \times 1 = -2 \).
Write the neutrality condition: \( x + (-2) = 0 \), which simplifies to \( x = 2 \).
Conclude that 2 ions with a +1 charge are required to balance one ion with a -2 charge to form a neutral compound.
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