Metals are

Options

A. malleable and ductile
B. non-malleable and ductile
C. brittle and ductile
D. non-malleable and non-ductile

Answer

To answer the question about the properties of metals, we can outline the key characteristics of metals step by step:

### Step-by-Step Solution:

1. **State of Matter**:
- Metals typically exist in a solid state at room temperature (with the exception of mercury, which is liquid).
- **Hint**: Remember that most metals are solid, which distinguishes them from non-metals.

2. **Malleability**:
- Metals are malleable, meaning they can be hammered or rolled into thin sheets without breaking.
- **Example**: Aluminum, gold, and silver can be shaped into thin sheets.
- **Hint**: Think of how aluminum foil is made; it’s a practical example of malleability.

3. **Ductility**:
- Metals are also ductile, which means they can be stretched into thin wires.
- **Example**: Copper and aluminum wires are common examples of ductile metals.
- **Hint**: Consider electrical wiring; it often uses ductile metals.

4. **Conductivity**:
- Metals are good conductors of heat and electricity, allowing them to transfer energy efficiently.
- **Hint**: This property is why metals are used in electrical wiring and cookware.

5. **Luster**:
- Metals have a shiny appearance, known as luster, which makes them visually appealing.
- **Hint**: Think about how gold and silver jewelry shines; this is due to their metallic luster.

6. **Brittleness**:
- Metals are generally not brittle; they can deform without breaking.
- **Hint**: Unlike non-metals, which can shatter easily, metals tend to bend or stretch.

### Conclusion:
Based on these properties, the correct classification for metals is that they are **malleable and ductile**. Therefore, the answer to the question is option 1: **Malleable and ductile**.