dipole moment is a ............ quantity.

Explanation

**Step-by-Step Solution:**

1. **Understanding Dipole Moment**: The dipole moment is a measure of the separation of positive and negative charges in a molecule. It indicates the polarity of the chemical bond between two atoms.

2. **Identifying the Nature of Dipole Moment**: The dipole moment is defined as a vector quantity. This means it has both a magnitude (size) and a direction.

3. **Defining Vector Quantity**: A vector quantity is characterized by having both direction and magnitude. For example, in the case of dipole moment, the direction is from the positive charge to the negative charge, and the magnitude can be calculated based on the amount of charge and the distance between the charges.

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