Substrand: "8.10 Periodic table" (12 periods)

This sub-strand introduces the Periodic Table to the learners. The periodic table is very important in the study of chemistry. The arrangement of the elements in the periodic table is special. Elements are placed in their column or row because of their properties. Columns in the Periodic Table are called “group numbers”, while rows are “period number”. “Mass number” indicates the total number of proton and neutrons in an atom. “Atomic number” indicates the number of protons or electron in an atom.

Learner's should:

Learner's should:

Learner's should:

8.10.1 know that Periodic table contain all element found on earth (k)

8.10.1.1 describe that the Periodic Table is special table with names (symbols) of all the elements found on the Earth

8.10.2 know the back ground history of the Periodic Table (k)

8.10.2.1 state that Dmitri Mendeleev in 1869 first published the Periodic table

8.10.3 know the general arrangement of the Periodic table (k)

8.10.3.1 state that; i. columns are “group numbers” ii. rows are “period numbers” iii. metals are generally on the right and non-metals are on the left of the Periodic Table

8.10.4 know the “Mass Number and Atomic Number” of an atom (k)

8.10.4.1 state that the ‘Mass Number’ of an element is the number of protons plus the number of neutrons in an atom
8.10.4.2 state that the atomic number is the number of protons or electrons in an atom

8.10.5 show the arrangement of the electrons around the nucleus of an atom (s)

8.10.5.1 draw the structure of the first 20 elements and write the electronic configuration of the atoms

8.10.6 understand that atoms combined together to form molecules or compounds (u)

8.10.6.1 explain the formation of a simple molecules or compounds (use very simple example such as Hydrogen H2, Oxygen O2, Carbon dioxide CO2 and Water H2O

8.10.7 appreciate that all materials around us are made of the elements in the Periodic Table (u)

8.10.7.1 express that all things both living and non living are made up of atoms