the group which has maximum number of element in Mendeleev's periodic table:

Explanation

To solve the question regarding which group has the maximum number of elements in Mendeleev's periodic table, we can follow these steps:

### Step 1: Understand Mendeleev's Periodic Table
Mendeleev's periodic table organizes elements based on their atomic mass and properties. It consists of several groups (columns) and periods (rows).

**Hint:** Familiarize yourself with the layout of Mendeleev's periodic table, focusing on the groups.

### Step 2: Identify the Groups
In Mendeleev's periodic table, elements are arranged into groups. Each group contains elements that have similar chemical properties.

**Hint:** Recall that groups are vertical columns in the periodic table.

### Step 3: Count the Elements in Each Group
To find out which group has the maximum number of elements, we need to count the elements in each group.

- Group 1 (Alkali Metals): Hydrogen (H), Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Cesium (Cs), Francium (Fr) - Total 7 elements.
- Group 2 (Alkaline Earth Metals): Beryllium (Be), Magnesium (Mg), Calcium (Ca), Strontium (Sr), Barium (Ba), Radium (Ra) - Total 6 elements.
- Other groups have fewer elements.

**Hint:** List out the elements in each group to easily count them.

### Step 4: Identify the Group with the Maximum Elements
From the counts above, we can see that Group 1 has 7 elements, which is the highest among the groups listed.

**Hint:** Compare the counts of each group to determine which is the largest.

### Step 5: Conclusion
The group with the maximum number of elements in Mendeleev's periodic table is Group 1 (Alkali Metals), which contains a total of 7 elements.

**Final Answer:** Group 1 has the maximum number of elements in Mendeleev's periodic table.

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