The positions of three elements A, B and C in the periodic table are shown below:
`{:("Group 16","Group 17"),(-,-),(-,A),(-,-),(B,C):}`
State whether A is metal or non-metal.

Explanation

To determine whether element A is a metal or a non-metal based on its position in the periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Groups**: The question states that element A is located in Group 17 of the periodic table.

2. **Understand Group Characteristics**: Group 17 is known as the halogens. The elements in this group include fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At). All of these elements are classified as non-metals.

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