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 ...

Aluminum is a metal in group IIIA of the periodic table with atomic number 13, an atomic weight of 26.982, and a density of 2.70. It has a melting temperature of 660 C. The electronic configuration of ...

This is made of aluminium. Aluminium is an element ... each other are put into vertical columns called groups. Now, the table is called the periodic table because the elements with similar ...

For instance, the Old Testament mentions salt – a combination of the alkali metal sodium ... column in the periodic table, but they also show the most reactivity of all groups in the entire ...

They react with metals to form metal halides ... Sample exam questions - groups in the periodic table - Edexcel Understanding how to approach exam questions helps to boost exam performance.

The periodic table, also called the periodic table ... electrons in a neutral atom of selenium. This non-metal resides in Period 4, Group 6A. That means selenium keeps its electrons in four ...