Title: वैकल्पिक

Text: The periodic table is a systematic arrangement of elements based on their atomic number, electron configurations, and recurring chemical properties. It is divided into groups (columns) and periods (rows). Groups indicate elements with similar properties due to their valence electrons, while periods reflect the number of electron shells. Elements are classified as metals, nonmetals, and metalloids, with distinct characteristics. The table also reveals trends such as electronegativity. प्रत्येक पराग्राफले परीक्षण हुनेछ।

Save test: यदि तपाईं यो टाइपिङ परीक्षणलाई साझा गर्न चाहानुहुन्छ भने यो प्रयोग गर्नुहोस् (केवल प्रमाणीकृत प्रयोगकर्ताहरूको लागि)।