Classify the following elements as metal, nonmetal or metalloid: aluminium, fluorine, gallium, phosphorus, tellurium, thorium, barium, strontium, calcium, krypton.

Explanation

To classify the elements given in the question as metals, nonmetals, or metalloids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Metals**: Elements that exhibit high metallic behavior, typically shiny, malleable, ductile, and good conductors of heat and electricity.
- **Nonmetals**: Elements that lack metallic properties, usually brittle in solid form, and poor conductors of heat and electricity.
- **Metalloids**: Elements that have intermediate properties between metals and nonmetals.
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