The charge on the atom containing 8 protons, 9 neutrons and 9 electrons is

Options

A. `-1`
B. `+1`
C. `zero`
D. `-2`

Answer

To determine the charge on the atom containing 8 protons, 9 neutrons, and 9 electrons, we can follow these steps:

### Step 1: Identify the number of protons, neutrons, and electrons
- Protons = 8
- Neutrons = 9
- Electrons = 9

### Step 2: Understand the charges of protons and electrons
- Protons have a positive charge (+1).
- Electrons have a negative charge (-1).
- Neutrons have no charge (0).

### Step 3: Calculate the total charge
- Since the number of protons is 8, the total positive charge contributed by protons is +8.
- Since the number of electrons is 9, the total negative charge contributed by electrons is -9.

### Step 4: Combine the charges
- The overall charge of the atom can be calculated by combining the positive and negative charges:

\[ \text{Total Charge} = (\text{Charge from Protons}) + (\text{Charge from Electrons}) \]

\[ \text{Total Charge} = (+8) + (-9) = +8 - 9 = -1 \]

### Conclusion
- The charge on the atom is -1.

### Final Answer
The charge on the atom is **-1**.

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