Advanced studies, chemical reactions, and laboratory experiments.
The shielding effect is the decrease in attraction between the nucleus and the valence electrons caused by the presence of inner (core) electrons. Trends in the Periodic Table 1. Across a Period (Left to Right) 2. Down a Group (Top to Bottom) Summary Table for Students Direction Shielding Effect Change Why? Across a Period Constant […]
The Shielding Effect in modern periodic table Read More »
The modern periodic table is organized by atomic number. Understanding periodic trends allows us to predict the chemical and physical behavior of elements based on their position (Group or Period). 1. Key Trends Overview Property Trend Across a Period (Left to Right) Trend Down a Group (Top to Bottom) Atomic Radius Decreases Increases Ionization Energy
Periodic Table Trends: A Comprehensive Guide Read More »
The Periodic Table did not appear overnight. It is the result of decades of scientific observation, pattern recognition, and chemical discovery. Below is the progression of the most significant models. 1. Döbereiner’s Triads (1817) Johann Wolfgang Döbereiner noticed that groups of three elements (triads) showed similar chemical properties. He observed that the atomic mass of
The Historical Development of the Periodic Table Read More »
Chemistry is often called the “central science” because it connects physics to life sciences and environmental sciences. While it can feel complex, mastering chemistry isn’t about memorizing—it’s about understanding the “why” behind the reactions. At Hailu Success Academy, we believe every student can excel in chemistry with the right approach. Here are five study techniques
5 Study Techniques to Master Chemistry Concepts Read More »
