The periodic table The periodic table is a chart of all the elements arranged in increasing atomic number. Group 1 alkali metals The Group 1 elements, also known as the alkali metals, all react ...

often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic ...

For example, a question about fertilisers could include ideas about covalent substances, acids and alkalis, chemical ... in an exam paper. Two elements in group 1 of the periodic table are lithium ...

This year we celebrate the 150 th anniversary of Mendeleev’s achievement in formulating the structure of the periodic table that ... with atomic weights that differed by seven. When Newlands gave a ...