This video explains the periodic table, containing all the known elements arranged in groups and periods. Elements in the same group of the periodic table show trends in physical properties ...

This video explains the periodic table, which contains all the known elements.

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On 17 February 1869, Russian chemist Dmitri Mendeleev jotted down the symbols for the chemical elements, putting them in order according to their atomic weights and inventing the periodic table.

Group 7 of the periodic table is something of an oddity. When the first periodic table was formulated by Mendeleev, it was the only group that contained just a single known element — manganese.

Check the RRB Group D important questions for history, geography, general science, current affairs, defence and much more, ...

Like the periodic table of elements, which has enabled generations ... All cells carry effectively the same bunch of genes, but different groups of those genes are used in, say, a nerve cell ...

6 Oganesson (Og) is the most recently added superheavy element (SHE) in the periodic table. It completes the seventh period and belongs to group 18 of the noble gases. So far, only five atoms of ...

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 'Trends' section within the RSC Periodc Table will allow you to observe the trends in atomic radius down a group. What is the general trend in atomic radius down a group? The atomic radius ...

The RRB Group D syllabus is an important resource for candidates preparing for the upcoming Indian Railway Level -1 post-exam ...