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The table below gives the numbers of protons, electrons, and neutrons in four atoms.

\begin{tabular}{|l|l|l|l|}
\hline Atom & Number of protons & Number of neutrons & Number of electrons \\
\hline 1 & 9 & 8 & 9 \\
\hline 2 & 9 & 9 & 8 \\
\hline 3 & 9 & 9 & 10 \\
\hline 4 & 9 & 10 & 9 \\
\hline
\end{tabular}

Based on the table, which atom has a charge of -1?

A. 1
B. 2
C. 3
D. 4

Sagot :

GinnyAnsweridn
To determine which atom has a charge of -1, we need to calculate the charge of each atom. The charge of an atom can be found by the formula:

[tex]\[ \text{Charge} = \text{Number of electrons} - \text{Number of protons} \][/tex]

Let's go through the atoms one by one:

1. Atom 1:
- Number of protons = 9
- Number of electrons = 9
[tex]\[ \text{Charge} = 9 - 9 = 0 \][/tex]
The charge of Atom 1 is 0.

2. Atom 2:
- Number of protons = 9
- Number of electrons = 8
[tex]\[ \text{Charge} = 8 - 9 = -1 \][/tex]
The charge of Atom 2 is -1.

3. Atom 3:
- Number of protons = 9
- Number of electrons = 10
[tex]\[ \text{Charge} = 10 - 9 = 1 \][/tex]
The charge of Atom 3 is 1.

4. Atom 4:
- Number of protons = 9
- Number of electrons = 9
[tex]\[ \text{Charge} = 9 - 9 = 0 \][/tex]
The charge of Atom 4 is 0.

Based on these calculations, Atom 2 has a charge of -1.

Therefore, the atom with a charge of -1 is Atom 2.
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