Which of the following is the correct squence of atomic weights of given elements?

Options

A. `Ni gt Co gt Fe`
B. `Fe gt Co gt Ni`
C. `Co gt Fe gt Ni`
D. `Co gt Ni gt Fe`

Explanation

To solve the question regarding the correct sequence of atomic weights of the given elements (nickel, cobalt, and iron), we will follow these steps:

### Step 1: Identify the Atomic Weights
We need to find the atomic weights of the three elements:
- **Nickel (Ni)**: Atomic weight = 58.69
- **Cobalt (Co)**: Atomic weight = 58.93
- **Iron (Fe)**: Atomic weight = 55.84

### Step 2: Compare the Atomic Weights
Now, we will compare the atomic weights of the three elements:
- Iron (Fe) has an atomic weight of 55.84.
- Nickel (Ni) has an atomic weight of 58.69.
- Cobalt (Co) has an atomic weight of 58.93.

### Step 3: Arrange in Order
From the comparison:
- Iron has the lowest atomic weight (55.84).
- Nickel is next (58.69).
- Cobalt has the highest atomic weight (58.93).

Thus, the correct order from lowest to highest atomic weight is:
**Iron < Nickel < Cobalt**.

### Step 4: Write the Sequence
The sequence of atomic weights from lowest to highest is:
**Fe < Ni < Co**.

### Step 5: Check Against Options
Now, we will check this sequence against the provided options:
1. Ni, Co, Fe (Incorrect)
2. Fe, Ni, Co (Incorrect)
3. Co, Fe, Ni (Incorrect)
4. Co, Ni, Fe (Correct)

### Final Answer
The correct sequence of atomic weights of the given elements is:
**Cobalt (Co) > Nickel (Ni) > Iron (Fe)**, which corresponds to option 4.

---