Each group of the modern periodic table consists of a number of elements having the similar electronic configuration of the_____shell.

Options

A. pendultimate
B. valence
C. outermost
D. antepenulimate

Explanation

To solve the question, let's break it down step by step:

### Step 1: Understand the Structure of the Modern Periodic Table
The modern periodic table is organized into groups (columns) and periods (rows). Each group contains elements that share similar properties.

**Hint:** Think about how elements are organized in the periodic table and what characteristics they share.

### Step 2: Identify the Concept of Electronic Configuration
Electronic configuration refers to the distribution of electrons in an atom's orbitals. Elements in the same group have similar electronic configurations in their outermost shell.

**Hint:** Recall what electronic configuration means and how it relates to the arrangement of electrons in an atom.

### Step 3: Focus on the Outermost Shell
In the context of the periodic table, the elements in a group have similar configurations in their outermost shell, which is responsible for their chemical properties.

**Hint:** Consider which shell is referred to as the outermost shell and its significance in determining the behavior of elements.

### Step 4: Determine the Correct Term
The question specifically asks for the shell that has a similar electronic configuration across a group. This is the valence shell, where the valence electrons reside.

**Hint:** Think about the term that describes the electrons involved in chemical bonding and reactions.

### Step 5: Conclude with the Answer
Based on the understanding that each group of the modern periodic table consists of elements with similar electronic configurations of the valence shell, we conclude that the answer is:

**Answer:** Each group of the modern periodic table consists of a number of elements having the similar electronic configuration of the **valence** shell.

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