Number of s-block elements are:

Options

A. More than that of p-block elements
B. Equal to that of p-block elements
C. More than that of d-block elements
D. None of the above

Answer

To determine the number of s-block elements, we can follow these steps:

### Step 1: Identify the Groups in the s-Block
The s-block of the periodic table consists of two groups:
- Group 1 (Alkali metals): Hydrogen (H), Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).
- Group 2 (Alkaline earth metals): Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), and Radium (Ra).

### Step 2: Count the Elements in Each Group
- Group 1 contains 7 elements.
- Group 2 contains 6 elements.

### Step 3: Calculate the Total Number of s-Block Elements
To find the total number of s-block elements, we add the elements from both groups:
\[ \text{Total s-block elements} = \text{Number of elements in Group 1} + \text{Number of elements in Group 2} \]
\[ \text{Total s-block elements} = 7 + 6 = 13 \]

### Step 4: Conclusion
Thus, the total number of s-block elements is **13**.