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 ...

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 ...

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 ...

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 ...

“Vb” was the most common suggestion, the transition metal vanadium having already ... which are a common feature in the boron group in the periodic table. Meanwhile, one student picked up ...

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.

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 ...

The periodic table ... Mendeleev’s table complete with missing elements. Wikimedia Commons Notice the question marks in his table above? For example, next to Al (aluminium) there’s space ...