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ANGELA & BRIAN

THE PERIODIC TABLE ~ ANGELA & BRIAN ~ AN ACROSTIC

 

DEVELOPMENT OF THE MODERN PERIODIC TABLE ~ AWESOME ! 

 

THE PERIODIC TABLE ~ Is a Logical Arrangement 

HYDROGEN (1)* to URANIUM (92) of the Natural

ELEMENTS !  Developed by MENDELEEV (1869)

 

PEOPLE interested in CHEMISTRY saw the properties of

ELEMENTS  were not all individually different ~ and

RESEMBLANCES  were observed : Chlorine : Bromine

IODINE (Halogens).  Also  Lithium : Sodium : Potassium

ONE of the Metallic Groups.  In the 20th C : We have .......

DISCOVERED this was due to their similar Electronic Structures !

In 1869 MENDELEEV characterised Families of Elements based on their

CHEMICAL (Valence etc) & PHYSICAL (Metals etc) properties !

 

THE PERIODIC TABLE  was arranged in order of Atomic Masses. MENDELEEV

ACCURATELY predicted properties of then undiscovered ELEMENTS !

BARIUM (56) was above eka-BARIUM (88) : Discovered by the CURIES and

LABELLED RADIUM !  MENDELEEV travelled to Paris to thank them !

ELEMENTS combine to form MILLIONS of CHEMICAL COMPOUNDS !

 

Thanks for visiting ~ comments welcome ~ Love A & B  🧡🧡🧡

 

* Numbers in parenthesis are ATOMIC NUMBERS based on the

number of  PROTONS in the Nucleus of the ATOM. There are no

missing elements in the modern Periodic Table.  The Periodic

Table is one of the most unifying Concepts in Science. It enables

us to se the properties and Combining Power (VALENCE) of 

individual Elements and whether they are  METALS ~ NON-METALS

or METALLOIDS !  in the UK the PERIODIC TABLE is taught (see

Video) at KEY STAGE 4 (aged 14 to 16). CHEMISTRY is a very

exact SCIENCE & is governed by Facts ~ Patterns & Principles

throughout he whole of the Physical Universe. BRIAN & ANGELA.

 

2019 (150th Anniversary of the PT) is designated as ~

THE YEAR OF THE PERIODIC TABLE !