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In discussing halogen reactivity (as covered in Core Idea), it is a common practice to argue that as you go down the Group 17 elements it becomes harder for the elements to gain an electron to form a ...

The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

In 1869, Mendeleev's first periodic table did not include them ... But Ramsey established their position between halogens and alkali metals, and was awarded the Nobel Prize in Chemistry in ...

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means ‘salt former’.

JEE Main session 1 is planned to be conducted on 22, 23, 24, 28, 29, and 30 January. The National Testing Agency (NTA) has already released the 2025 JEE Main Admit Card for the initial three days.

The periodic table thus established remained until the ... they formed the bridge from a non-metallic halogen (electro-negative element) to a metallic alkali (electro-positive element).

Often dismissed as the poor cousin of the sciences, chemistry has revealed natural laws that illuminate our Universe ...

The best halogen heaters should combine the cheap running costs they're renowned for with excellent heating capability. Our tests of indoor halogen heaters reveal their running costs and heating ...