Every period of the periodic table (except first period) starts with a member of alkali metal. (T/F)

Answer

To determine whether the statement "Every period of the periodic table (except the first period) starts with a member of alkali metal" is true or false, we can analyze the structure of the periodic table.

### Step-by-Step Solution:

1. **Understanding the Periods of the Periodic Table**:
- The periodic table consists of 7 periods.
- Each period represents a row in the table, and elements in the same period have the same number of electron shells.

2. **Identifying the First Period**:
- The first period contains only two elements: Hydrogen (H) and Helium (He).
- Hydrogen is not an alkali metal; it is placed in Group 1 but is not classified as an alkali metal. Helium is a noble gas.

3. **Identifying the Alkali Metals**:
- Alkali metals are found in Group 1 of the periodic table, starting from Lithium (Li) down to Cesium (Cs) and Francium (Fr).
- The alkali metals include: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), and Francium (Fr).

4. **Analyzing the Remaining Periods**:
- The second period starts with Lithium (Li), which is an alkali metal.
- The third period starts with Sodium (Na), which is also an alkali metal.
- The fourth period starts with Potassium (K), and this continues for the subsequent periods with Rubidium (Rb), Cesium (Cs), and Francium (Fr).

5. **Conclusion**:
- Since every period after the first (2nd to 7th) begins with an alkali metal, the statement "Every period of the periodic table (except the first period) starts with a member of alkali metal" is **True**.

### Final Answer:
**True**