Number of elements which will not react even with boiling water is
Sodium, iron, zinc, copper, magnesium, silver.

Explanation

To solve the question of how many elements from the list (Sodium, Iron, Zinc, Copper, Magnesium, Silver) will not react even with boiling water, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactivity of Each Element with Water:**
- **Sodium (Na):** Sodium reacts vigorously with water, even at room temperature, producing sodium hydroxide and hydrogen gas.
- **Iron (Fe):** Iron reacts with steam (boiling water) to form iron oxide and hydrogen gas.
- **Zinc (Zn):** Zinc also reacts with steam to produce zinc oxide and hydrogen gas.
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