First, study the chapter and learn the concepts thoroughly. Later, try answering the questions given in the Selina textbook. Once you are done with solving them, evaluate how right your answers are by comparing it with the ICSE Selina Class 8 Chemistry Chapter 4- Atomic Structure Solutions by BYJU'S.

Chemistry Chapter 4 Atomic Struture 1 Chapter 4 Structure of the Atom I. Early Theories of Matter (pgs. 87-91) A. Greek Philosophers 1. Democritus & Leucippus (500 BC) all matter is made up of tiny particles (atomos - indivisible) - not based CHEMISTRY NOTES - Chapter 5 Atomic Structure and the Periodic Table Goals : To gain an understanding of : 1. Atoms and their structure. 2. The development of the atomic theory. 3. The periodic table. NOTES: An atom is the smallest part of an element that retains the properties of that element. The concept of an atom goes a long way back. Atomic Structures Study Guide ANSWERS 1. The Periodic Table is mostly made of metals. 2. The nobile gases are the farthest group to the right on the Periodic Table. 3. Atoms having equal numbers of positive and negative charges make them neutral. 4. The three primary sub-atomic particles that atoms are made of are protons, neutrons & electrons. 5. Supplemental Problems Chemistry: Matter and Change • Chapter 2 1 Data AnalysisData Analysis 1. A sample of aluminum is placed in a 25-mL graduated cylinder containing 10.0 mL of water. The level of water rises to 18.0 mL. Aluminum has a density of 2.7 g/mL. Calculate the mass of the sample. 2. Saturn is about 1 429 000 km from the Sun. in text book, Chapter 4) c. Illustrate Rutherford's model of the atom. He concluded that most of the atom is empty space, but there was a small dense region in the atom composed of protons. He called this dense region the nucleus. What was a problem with Rutherford's model of the atom? Following are the various models explaining structure of an atom: 1. Thomson's Model of an atom. It is also known as T