The group 1 elements are all soft ... Sample exam questions - groups in the periodic table - Edexcel Understanding how to approach exam questions helps to boost exam performance.

The periodic ... Moving down the table, periods are longer because it takes more electrons to fill the larger and more complex outer levels. The columns of the table represent groups, or families ...

8. Element X forms a chloride with the ... Explanation: As the element belongs to the 1 st group of the periodic table, so the number of valence electrons in its atom is one.

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