Which of the following has density greater than water?

Options

A. Li
B. Na
C. K
D. Cs

Explanation

To determine which of the given elements has a density greater than water, we need to compare the densities of the elements listed with the density of water.

### Step-by-Step Solution:

1. **Identify the Densities of the Elements:**
- Lithium (Li): 0.53 g/cm³
- Sodium (Na): 0.97 g/cm³
- Potassium (K): 0.86 g/cm³
- Cesium (Cs): Not mentioned in the options but is known to be greater than water.

2. **Identify the Density of Water:**
- The density of water is approximately 1 g/cm³.

3. **Compare Densities:**
- Compare the densities of lithium, sodium, and potassium with the density of water:
- Lithium: 0.53 g/cm³ < 1 g/cm³ (less dense than water)
- Sodium: 0.97 g/cm³ < 1 g/cm³ (less dense than water)
- Potassium: 0.86 g/cm³ < 1 g/cm³ (less dense than water)

4. **Conclusion:**
- All three elements (lithium, sodium, and potassium) have densities that are less than that of water.
- The only element mentioned in the discussion that has a density greater than water is cesium (Cs), which is not one of the options provided.

5. **Final Answer:**
- Therefore, none of the provided options (lithium, sodium, potassium) have a density greater than water. The only element that does is cesium.