Sodium, like most elements in the periodic table could be said to have a dual personality ... It is one of the highly reactive group one elements that are named the alkali metals. Like the other ...

Gethin: And today we're going to be looking at the periodic table. Let's take a look at some Group 1 metals then - also known as alkaline metals. Fran: Group 1 elements are called the alkali metals.

When Mendeleev first proposed his periodic table in 1869 he left gaps for elements not ... From its position in the table, it was clear that element 87 would be a reactive alkali metal, the heaviest ...

When a small piece of sodium is placed in a petri dish with water and phenolphthalein, the sodium becomes a molten ball and darts around the dish, leaving a pink trail. The reactions of potassium, ...