Below are some elements of modern periodic table
`""_4Be , ""_9F, ""_14Si, ""_19K,""_20Ca`
Select two elements which belong to same period

Explanation

To solve the question of selecting two elements from the provided list that belong to the same period in the modern periodic table, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Elements and Their Atomic Numbers**:
- Beryllium (Be) - Atomic Number 4
- Fluorine (F) - Atomic Number 9
- Silicon (Si) - Atomic Number 14
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