University:
College
Course:
College Chemistry
Academic year:

2023
Views:

30

Pages:

2
Author:

anon

IB Chemistry: The Periodic Table The Periodic Table Describe the arrangement of elements in the periodic table in order of increasing atomic number. Elements in the periodic table are arranged in order of increasing atomic number (Z). There is a division between metals and non-metals. Metals are on the left and non-metals are on the right. Metals tend to have a smaller number of electrons in their outer-shell. Long metal periods are divided into the transition metals, lanthanids and actinides Distinguish between the terms group and period ● Group:A vertical column of elements. IB numbers them from 1 to 7, with the noble gases being in group 0. Some groups have names, such as Alkali metals (group 1), and Halogens (group 7). Group 3 to 6 have both metals and non-metals. ● Periods: A horizontal row of elements. Numbered from 1 to 17. The number matches the number of its outer shell electrons. Elements of the same period have the same number of occupied electron shells. Apply the relationship between the electron arrangement of elements and their position in the periodic table up to Z = 20. The position of elements on the periodic table is linked to their electronic configuration. Elements in the same group have the same outer shell electron configuration. Elements of the same period have the same number of occupied electron shells. This in turn affects their physical and chemical properties. e.g. Sulfur is in group 6 and period 3 Its electron arrangement is 2,8 ,6 (6 outer electrons, 3 shells) Apply the relationship between the number of electrons in the highest occupied energy level for an element and its position in the periodic table. Group Number -The same as the number of electrons in the outershell -Group 1=1 outer shell electron Period Number -The same as the number of shells in the atom -All except the outer shell will be full.