The outermost shell of an atom is called its__________ and the electrons present in the outermost'shell are called __________

Explanation

**Step-by-Step Solution:**

1. **Identify the Outermost Shell of an Atom:**
The outermost shell of an atom is the shell that is farthest from the nucleus. It contains the electrons that are involved in chemical bonding and reactions.

2. **Name of the Outermost Shell:**
The outermost shell is called the **valence shell**. This shell determines the chemical properties of the atom.

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