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Assistant General Science

Chemistry – 03

ആവർത്തന പട്ടികയുമായി ബന്ധപ്പെട്ട ചോദ്യങ്ങളാണ് ഇന്നത്തെ പാഠത്തിൽ ഉൾപ്പെടുത്തിയിട്ടുള്ളത്.

  • Father of Periodic table\Periodic table was discovered by

Dmitri Mendeleev

 

  • Father of Modern Periodic table

Moseley

 

  • Periodic law was put forward by

Dmitri Mendeleev

 

  • Modern Periodic law was put forward by

Moseley

 

  • Atomic number of elements were discovered by

Moseley

 

  • Periodic table of Mendeleev was based on increasing order of

Atomic mass

 

  • Who classified elements based on atomic volume

Lother Meyer

 

  • Modern Periodic table is based on increasing order of

Atomic Number

 

  • Scientist who established measuring and weighing methods in Chemistry

Lavoisier

 

  • Horizontal rows of elements in Periodic table

Periods

 

  • No of periods in Periodic table

7

 

  • Vertical column of elements in Periodic table

Groups

 

  • No of groups in Periodic table

18

 

 

  • Horizontal rows of elements in Periodic table

Periods

 

 

  • Shortest period

First Period (Contains only two elements)

 

 

  • Horizontal rows of elements in Periodic table

Periods

 

 

  • No of elements in periodic table

118

 

  • No of naturally occurring elements in periodic table

92

 

  • First artificial element

Technetium (Atomic number 43)

 

  • Last natural element in periodic table

Uranium

 

  • Position of metals in periodic table

Left side

 

  • Position of non-metals in periodic table

Right side

 

  • Natural element having highest atomic weight and atomic number

Uranium (92)

 

  • Characteristic of element in one group

No of electrons in outermost shell are same

 

  • Element having atomic number greater than that of Uranium and do not occur in nature are called

Synthetic (Transuranic) elements

 

  • Element having name of Earth

Tellurium

 

  • Element having name of Moon

Selenium

 

  • Element having name of Sun

Helium

 

  • Element having name of an asteroid

Palladium

 

  • Elements which are named in the honour of women

Curium, Meitnarium

 

  • Group 1 elements are called

Alkali Metals

 

  • Group 2 elements are called

Alkaline Earth Metals

 

  • Elements with atomic number 57-71 are called

Lanthanides (Rare earth)

 

  • Elements with atomic number 89-103 are called

Actinides (Radioactive rare earth)

 

  • Elements included in 3-12 groups are called

Transition elements

 

  • Elements other than transition elements are called

Representative elements

 

  • Specialty of transitive elements

They all are metals and form coloured compounds

 

  • Element does not have neutrons in an atom

Hydrogen

 

  • Liquid transitive metal

Mercury

 

  • Liquid metal at room temperature

Mercury

 

  • Liquid non-metal at room temperature

Bromine

 

  • Metal used as a thermometric fluid

Mercury

 

  • Metal which is used in atomic clocks

Caesium

 

  • Element used in the dials clock

Radium

 

  • Radium and Plutonium are discovered by

Marie Curie

 

  • Metal which shows the least expansion

Caesium

 

  • Element having highest electronegativity

Fluorine

 

  • Element having least electronegativity

Francium, Caesium

 

  • Most electro positive stable element

Caesium


                                                                                 (To be Continued…)