In the following, the element with the highest electropositivity is

Options

A. Copper
B. Cesium
C. Barium
D. Chromium

Answer

To determine the element with the highest electropositivity among the given options, we will follow these steps:

### Step 1: Understand Electropositivity
Electropositivity is defined as the tendency of an element to donate electrons and form positively charged ions (cations). Generally, metals exhibit higher electropositivity compared to non-metals.

**Hint:** Remember that electropositivity is associated with the ability to lose electrons easily.

### Step 2: Identify the Elements
The elements mentioned in the question are:
- Copper (Cu) - Atomic number 29
- Cesium (Cs) - Atomic number 55
- Barium (Ba) - Atomic number 56
- Chromium (Cr) - Atomic number 24

**Hint:** Write down the atomic numbers and groups of the elements to help in comparison.

### Step 3: Classify the Elements
- **Copper (Cu)**: Transition metal, not very electropositive.
- **Cesium (Cs)**: Alkali metal (Group 1), very electropositive.
- **Barium (Ba)**: Alkaline earth metal (Group 2), also electropositive but less than alkali metals.
- **Chromium (Cr)**: Transition metal, less electropositive compared to alkali and alkaline earth metals.

**Hint:** Alkali metals are generally the most electropositive elements in the periodic table.

### Step 4: Compare Electropositivity
- Alkali metals (like cesium) are more electropositive than alkaline earth metals (like barium).
- Among the alkali metals, cesium is the largest and has the lowest ionization energy, making it easier to lose an electron compared to other elements.

**Hint:** Consider the group trends in the periodic table; electropositivity increases down the group.

### Step 5: Conclusion
Based on the above analysis, cesium (Cs) has the highest electropositivity among the given elements due to its position in Group 1 and its larger atomic size, which facilitates easier electron loss.

**Final Answer:** The element with the highest electropositivity is **Cesium (Cs)**.