EXERCISE 1-PAIRWORK
Complete the following passage choosing the terms
among those listed below
atomic mass – properties – non metals - period – names - elements – metals - group -
atomic number -
All materials are made up of (1) ..................................... The periodic table is used to
organise elements according to their (2) ...............................................................
Elements with similar (3) ............................................. are placed in the same column.
Each column is called (4) ..............................; the rows are called (5).........................................
A line runs diagonally across the right side of the table to separate the (6) ..........................
at the left from the (7) ..................................................... at the right.
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