When the first element of the periodic table is treated with dioxgyen , it gives a compound whose soilds state floats on its liquid state. This compound has an ability to act as an well as a base. What products will be formed when this compound undergoes autoionsation?

Explanation

To solve the question, we will follow these steps:

### Step 1: Identify the Compound Formed
When the first element of the periodic table, hydrogen (H), reacts with oxygen (O2), it forms water (H2O).

### Step 2: Analyze the Properties of Water
Water is a unique compound that exists in a solid state (ice) and a liquid state (water). Ice floats on water because its density is less than that of liquid water.

### Step 3: Understand Water's Acid-Base Behavior
Water can act as both an acid and a base. This property is due to its ability to donate protons (H+) and accept protons, making it amphoteric.

### Step 4: Autoionization of Water
The autoionization of water refers to the process where water molecules react with each other to form ions. The reaction can be represented as:
\[ \text{H}_2\text{O (l)} + \text{H}_2\text{O (l)} \rightleftharpoons \text{H}_3\text{O}^+ \text{ (aq)} + \text{OH}^- \text{ (aq)} \]

### Step 5: Identify the Products
From the autoionization reaction, the products formed are:
- Hydronium ion (\( \text{H}_3\text{O}^+ \))
- Hydroxide ion (\( \text{OH}^- \))

### Final Answer
The products formed when water undergoes autoionization are \( \text{H}_3\text{O}^+ \) and \( \text{OH}^- \).

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