The atomic numbers of three elements L,M and P are `Z,Z+1 and Z+2` respectively. If P belong to alkali metal group, then the bond present in the compound obtained by the combination of the L and P is :

Options

A. Electrovalent
B. Covalent
C. Coordinate
D. Not known

Answer

To solve the problem, we need to analyze the elements L, M, and P based on their atomic numbers and the information given about P belonging to the alkali metal group.

### Step-by-Step Solution:

1. **Identify the Atomic Numbers of the Elements:**
- Let the atomic number of element L be \( Z \).
- Then, the atomic number of element M is \( Z + 1 \).
- The atomic number of element P is \( Z + 2 \).

2. **Determine the Group of Element P:**
- It is given that element P belongs to the alkali metal group.
- Alkali metals are found in Group 1 of the periodic table.

3. **Identify the Position of Elements L and M:**
- Since P is in Group 1 (alkali metals), its atomic number \( Z + 2 \) corresponds to an alkali metal.
- The element with atomic number \( Z + 1 \) (M) would be in Group 17, which is the halogen group.
- The element with atomic number \( Z \) (L) would then be in Group 16, which is the chalcogen group.

4. **Classify the Elements:**
- Element P (alkali metal) is a metal.
- Element L (chalcogen) is a non-metal.
- Element M (halogen) is also a non-metal.

5. **Determine the Type of Bond Formed Between L and P:**
- When a metal (P) combines with a non-metal (L), they typically form an ionic bond.
- Ionic bonds are formed when electrons are transferred from the metal to the non-metal, resulting in the formation of positive and negative ions.

6. **Conclusion:**
- Therefore, the bond present in the compound obtained by the combination of elements L and P is an **ionic bond** (also known as an electrovalent bond).

### Final Answer:
The bond present in the compound obtained by the combination of elements L and P is an **ionic bond**.