Periodic classification of elements is used to examine the

Options

A. Periodic trends in physical properties of elements
B. Periodic trends in chemical properties of elements
C. both(1)(2)
D. none of the above

Answer

To answer the question "Periodic classification of elements is used to examine the," we can follow these steps:

### Step 1: Understand the Concept of Periodic Classification
Periodic classification refers to the arrangement of elements in a systematic way based on their properties. This classification was significantly advanced by Henry Moseley, who arranged elements according to their atomic numbers.

**Hint:** Think about the historical context of periodic classification and who contributed to its development.

### Step 2: Identify the Basis of Classification
Henry Moseley arranged elements in the periodic table based on increasing atomic number. This arrangement helps in identifying trends and similarities among elements.

**Hint:** Consider what atomic number represents and how it relates to the properties of elements.

### Step 3: Recognize the Grouping of Elements
In the periodic table, elements are grouped into columns (groups) and rows (periods). Elements in the same group exhibit similar physical and chemical properties.

**Hint:** Reflect on the concept of groups in the periodic table and what it means for elements to have similar properties.

### Step 4: Determine the Types of Properties Examined
The periodic classification allows for the examination of periodic trends in both physical and chemical properties of elements. This includes trends such as electronegativity, atomic radius, ionization energy, and more.

**Hint:** Think about what specific physical and chemical properties can be compared across different elements in the same group.

### Step 5: Conclude the Answer
Based on the understanding of periodic classification, we can conclude that it is used to examine periodic trends in both physical and chemical properties of elements.

**Final Answer:** Periodic classification of elements is used to examine periodic trends in physical and chemical properties of elements.