PURPOSE

INTRODUCTION

A. LEARNING MEDIA IDENTITY

Subject : CHEMISTRY

Class : X Allocation

Time : 2 X Meeting (4 JP)

Module Title : Atomic structure, Periodic System of Elements, and chemical elements

B. BASIC COMPETENCIES

3 .2 Analyze the development of atomic models from the models of Dalton, Thomson, Rutherfod, Bohr, and wave mechanics

4. 2 Using atomic models to explain natural phenomena or experimental results.

3. 4 Analyze the similarity of the properties of elements in groups and their periodic ferous

4. 4 Reasoning the similarity and periodicity of elemental properties based on data on properties of periodic elements

C. DESCRIPTION

The material in this platform will give you knowledge about the development of atomic models from time to time starting from ancient atomic theory proposed by Democritus, Dalton's atomic theory, J.J. Thomson, Rutherford, Niels Bohr to Quantum Mechanics with also illustrations of atomic models. In addition, this module also describes the basic particles of atomic arrangement and its discovery experiments. For example, the discovery of electrons by Thomson using cathode ray tube experiments, the discovery of atomic nuclei by Rutherford using the firing of thin plates of metal with alpha rays, and others.

Periodic properties of elements are those that have a tendency to change regularly according to the increase in atomic number, in the same period period and in the same group. The periodic properties that you will learn include atomic radius, ionization energy, electron affinity, electronegativity, metallic and nonmetallic properties. How do these properties tend to be in the periodic table? Let's be more enthusiastic about learning this learning media!

D. USAGE INSTRUCTIONS

This platform is used as a prerequisite in studying atomic structure material in subsequent learning. To use this platform follow the steps below:

1. Read the guide and understand the Development of the Atomic Model

2. Give a response to environmental observation activities, then understand learning material and sample questions

3. Deepen your understanding of the concept of atomic model development by understanding the learning material summary, video, simulation then doing self-assignments

4. End the activity by filling out the self-assessment honestly and repeat it again in the part that is still not fully understood

5. Do the evaluation questions at the end of the material.

E. LEARNING MATERIALS

This platform is learning activities and in it there are material descriptions, sample questions, practice questions, simulation and evaluation questions. Discuss the development of the atomic and discuss Atomic Particles 

F. PPROACH, MODEL, AND METHODE

Approach : Scientific

Model : Direct learning

Methode : Discussion, Observation, and Simulations