To determine which atom has a charge of -1, we will calculate the charge for each atom. The charge of an atom is calculated as the difference between the number of electrons and the number of protons. The charge is given by:
[tex]\[
\text{Charge} = \text{Number of electrons} - \text{Number of protons}
\][/tex]
Given the data in the table, let's compute the charge for each atom:
1. Atom 1:
- Number of protons: 9
- Number of electrons: 9
[tex]\[
\text{Charge} = 9 - 9 = 0
\][/tex]
Charge of Atom 1 is 0.
2. Atom 2:
- Number of protons: 9
- Number of electrons: 8
[tex]\[
\text{Charge} = 8 - 9 = -1
\][/tex]
Charge of Atom 2 is -1.
3. Atom 3:
- Number of protons: 9
- Number of electrons: 10
[tex]\[
\text{Charge} = 10 - 9 = 1
\][/tex]
Charge of Atom 3 is 1.
4. Atom 4:
- Number of protons: 9
- Number of electrons: 9
[tex]\[
\text{Charge} = 9 - 9 = 0
\][/tex]
Charge of Atom 4 is 0.
Now that we have calculated the charges for each atom, we can see which atom has a charge of -1. From the computations, Atom 2 has a charge of -1.
Thus, the atom with a charge of -1 is Atom 2.
