Chapter03 - Applied Science Department (ASD) Centre for...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
PCE 0015 Chemistry for Engineers Foundation in Engineering ONLINE NOTES Chapter 3 THE PERIODIC TABLE FOSEE , MULTIMEDIA UNIVERSITY (436821-T) MELAKA CAMPUS, JALAN AYER KEROH LAMA, 75450 MELAKA, MALAYSIA. Tel 606 252 3594 Fax 606 231 8799 URL: http://fosee.mmu.edu.my/~asd/ Applied Science Department (ASD) Centre for Foundation Studies and Extension Education (FOSEE)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
PCE0015 Chemistry For Engineers Chapter 3 3.1 The Modern Periodic Table 3.2 Periodic Classification of The Elements 3.3 Periodic Variation in Physical Properties 3.4 Variation in Chemical Properties of the Representative Elements Upon completion of this chapter, you should be able to: 1. Understand the modern periodic table. The modern periodic tables classifies the elements according to their atomic number, and thus also by their electron configurations. The configurations of the valence electron directly affects the properties of the atoms of the representative elements. 2. Classified the elements in the periodic table. 3. Explain the periodic variation in physical properties. For example, atomic radius varies periodically with the arrangement of the elements in the periodic table. It decreases from left to right and increases from top to bottom. 4. Distinguish the variation in chemical properties of the representative elements (Group 1A to Group 8A). __________________________________________________________________________________ HST/MAM 2/ 11
Background image of page 2
PCE0015 Chemistry For Engineers Chapter 3 3.1 THE MODERN PERIODIC TABLE More than half of the elements known today were discovered between 1800 and 1900. During this period, chemist noted that many elements show strong similarities to one another. Recognition of periodic regularities in physical and chemical behavior and the need to organize the large volume of available information about the structure and properties of elemental substances led to the development of the periodic table , a chart in which elements having similar chemical and physical properties are grouped together . There are more than 110 elements listed in the modern periodic table. The elements are placed in order of increasing atomic number. The periodic table is divided into groups and periods. Groups , or families, are the vertical column of elements that have similar properties. We place a group number (for example, 1A, 2A, 3B, and so on) at the top of each column. Periods are the horizontal rows of elements. The periods vary in length from two elements (the first period) to 32 elements (the sixth and seventh periods). If all the elements were included in the periodic table, it would be have to be quite wide to accommodate the periods containing 32 elements, and there would be a large blank space above these long periods. By extracting a 14-element series from the sixth and seventh periods and listing these two series separately at the bottom of the table, we can use a more compact form that limits the width of the table to 18 elements. The two 14- element series are called the
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/10/2010 for the course CHM CHM101 taught by Professor Woljaong during the Fall '07 term at Multimedia University, Cyberjaya.

Page1 / 11

Chapter03 - Applied Science Department (ASD) Centre for...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online