Classify the following into ionic, molecular,cvalent and metallic crystals.
Bronze, Dry ice, Nitre and Diamond

Explanation

To classify the given substances into ionic, molecular, covalent, and metallic crystals, we will analyze each substance based on its composition and bonding characteristics.

### Step 1: Classify Bronze
- **Analysis**: Bronze is an alloy primarily made of copper and tin (or zinc). Alloys are typically composed of metals and exhibit metallic bonding.
- **Classification**: Bronze is classified as a **metallic crystal**.

### Step 2: Classify Dry Ice
- **Analysis**: Dry ice is the solid form of carbon dioxide (CO₂). It consists of discrete CO₂ molecules held together by van der Waals forces, which are typical of molecular solids.
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