The atomic number of an element is 16. Predict its group number

Explanation

To determine the group number of an element with an atomic number of 16, follow these steps:

### Step-by-Step Solution:

1. **Identify the Element**: The atomic number 16 corresponds to the element Sulphur (S). The atomic number indicates the number of protons in the nucleus of an atom, and each element has a unique atomic number.

2. **Locate the Element in the Periodic Table**: In the modern periodic table, elements are arranged in groups (columns) and periods (rows). Sulphur is located in the third period.

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