Category Archives: 3.1 The Periodic Table and its trends

Trends within the Periodic Table

Group 1, the alkali metals The elements: ■ are metals with low density (the first three elements in the group are less dense than water) ■ react with non-metals to form ionic compounds in which the metal ion carries a charge of +1.The compounds are white solids that dissolve in water to form colourless solutions ■ react with water, releasing hydrogen ■ form hydroxides

Read more

Early vs modern Periodic Table

The early Periodic Table Newlands, and then Mendeleev, attempted to classify the elements by arranging them in order of their atomic weights. The list can be arranged in a table so that elements with similar properties are in columns, known as groups. The table is called a periodic table because similar properties occur at regular intervals. The early periodic tables were incomplete and some elements were placed

Read more