Reactivity increases down the group. Group 7 - the halogens - Edexcel The group ... Sample exam questions - groups in the periodic table - Edexcel Understanding how to approach exam questions ...

The periodic ... number. Group 1 alkali metals The Group 1 elements, also known as the alkali metals, all react vigorously with water to produce an alkaline solution. Group 7 halogens The Group ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...