Question

explain about drop acts of Mendeleff

Answer 1

Ans : Dmitri Mendeleev, the Russian chemist who published what is regarded as the first widely recognised periodic table, has been celebrated with his own Google doodle on what would have been his 182nd birthday.

The inventor formulated the periodic law – which states that elements can be arranged by their mass and be organised into groups that share similar chemical and physical properties.

Mendeleev’s “eureka moment” came when he realised that there was a system underpinning the properties of all the elements. As a result, not only was he able to organise the known elements into a table, but – crucially – he realised that some elements existed that had yet to be discovered.

He published his Periodic Table – in all its incomplete beauty - in 1869.

The table consists of 118 elements, which are organised by their atomic numbers. 

An atomic number counts the protons within the nucleus of an atom which - along with neutrons - make up the majority of the weight of an atom. 

It is divided into periods (the rows) and groups (the columns). Six of the groups have their own name – perhaps the most well-known of these being the noble gases (group 18).



Hope it's help you! ! !

Answer 2

dropacts of Mendeleff

see the above attachment mate