The atomicity of all halogens is ….

Answer

To determine the atomicity of all halogens, we can follow these steps:

### Step 1: Define Atomicity
Atomicity refers to the number of atoms present in a molecule of a substance.

**Hint:** Remember that atomicity can vary among different elements and compounds.

### Step 2: Identify the Halogens
The halogens are a group of elements in Group 17 of the periodic table, which include:
- Fluorine (F)
- Chlorine (Cl)
- Bromine (Br)
- Iodine (I)
- Astatine (At)

**Hint:** Make sure to list all the halogens to avoid missing any.

### Step 3: Determine the Molecular Forms of Halogens
Halogens exist as diatomic molecules in their elemental form. This means that they naturally pair up to form molecules consisting of two atoms. The common diatomic forms are:
- Fluorine: F₂
- Chlorine: Cl₂
- Bromine: Br₂
- Iodine: I₂

**Hint:** Look for the common diatomic molecules in the periodic table.

### Step 4: Conclude the Atomicity
Since each halogen exists as a diatomic molecule, the atomicity of all halogens is 2. This means that each molecule of a halogen is made up of two atoms.

**Hint:** Remember that the atomicity is the same for all halogens, regardless of their individual properties.

### Final Answer
The atomicity of all halogens is 2.

---