Assertion (A) Hydrogen combines with order elements by losing, gaining or sharing of electrons.
Reason (R ) Hydorgen forms electrovalent and covalent bonds with other elements.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is False.
D. If both Assertion & Reason are False.

Answer

To solve the given question, we will analyze both the assertion and the reason provided.

**Assertion (A):** Hydrogen combines with other elements by losing, gaining, or sharing of electrons.

**Reason (R):** Hydrogen forms electrovalent and covalent bonds with other elements.

### Step-by-Step Solution:

1. **Understanding Hydrogen's Atomic Structure:**
- Hydrogen has an atomic number of 1, meaning it has one electron and one proton.
- This single electron can participate in various types of bonding to achieve a stable electronic configuration.

**Hint:** Remember that hydrogen can either lose its single electron or gain another to achieve stability.

2. **Losing Electrons:**
- When hydrogen loses its electron, it can form a cation (H⁺) and achieve a stable configuration similar to that of helium.
- For example, when hydrogen reacts with metals like sodium (Na), it can accept an electron from sodium, forming sodium hydride (NaH). Here, sodium loses one electron and hydrogen gains it.

**Hint:** Look for examples of hydrogen forming ionic compounds to understand this process.

3. **Gaining Electrons:**
- Conversely, hydrogen can gain an electron to form a hydride ion (H⁻). In this case, it achieves a stable configuration by having two electrons (like helium).
- This is typical in reactions with more electropositive elements.

**Hint:** Consider how hydrogen behaves in reactions with metals to form hydrides.

4. **Sharing Electrons:**
- Hydrogen can also share its electron with other nonmetals to form covalent bonds.
- A classic example is methane (CH₄), where each hydrogen atom shares its single electron with carbon, resulting in a stable molecule.

**Hint:** Think about how covalent bonds are formed through sharing of electrons, especially in organic compounds.

5. **Conclusion on Assertion and Reason:**
- Since hydrogen can indeed lose, gain, or share electrons, the assertion is correct.
- Additionally, the reason provided explains how hydrogen forms both ionic (electrovalent) and covalent bonds, which supports the assertion.

**Hint:** Assess whether the reason logically supports the assertion to determine their relationship.

### Final Answer:
Both the assertion and reason are correct, and the reason is the correct explanation of the assertion. Therefore, the answer is option A.