Total number of elements of group 13 and 14 which form basic oxides is

Explanation

To determine the total number of elements in groups 13 and 14 that form basic oxides, we can follow these steps:

### Step 1: Identify Group 13 Elements
Group 13 of the periodic table consists of the following elements:
- Boron (B)
- Aluminum (Al)
- Gallium (Ga)
- Indium (In)
- Thallium (Tl)

### Step 2: Identify Basic Oxides in Group 13
Among these elements, we need to identify which ones form basic oxides.
- Boron (B) generally forms acidic oxides.
- Aluminum (Al) can form amphoteric oxides (both acidic and basic characteristics).
- Gallium (Ga) also forms amphoteric oxides.
- Indium (In) can form basic oxides.
- Thallium (Tl) forms basic oxides.

Thus, the elements from Group 13 that can form basic oxides are:
- Indium (In)
- Thallium (Tl)

### Step 3: Identify Group 14 Elements
Group 14 of the periodic table consists of the following elements:
- Carbon (C)
- Silicon (Si)
- Germanium (Ge)
- Tin (Sn)
- Lead (Pb)

### Step 4: Identify Basic Oxides in Group 14
Now, we check which of these elements form basic oxides:
- Carbon (C) generally forms acidic oxides.
- Silicon (Si) also forms acidic oxides.
- Germanium (Ge) can form amphoteric oxides.
- Tin (Sn) can form basic oxides.
- Lead (Pb) can form basic oxides.

Thus, the elements from Group 14 that can form basic oxides are:
- Tin (Sn)
- Lead (Pb)

### Step 5: Count the Total Elements
Now, we can summarize the findings:
- From Group 13: Indium (In), Thallium (Tl) → 2 elements
- From Group 14: Tin (Sn), Lead (Pb) → 2 elements

### Final Count
Total number of elements from Group 13 and 14 that form basic oxides = 2 (from Group 13) + 2 (from Group 14) = 4 elements.

### Answer
The total number of elements of Group 13 and 14 which form basic oxides is **4**.

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