Chemistry 3

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

• Shortest period

                 First Period (Contains only two elements)

• 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

                 Celenium

• Element having name of Sun

                 Helium

• Element having name of an asteroid

                 Palladium

• Elements which are named in the honor 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 earths)

• Elements with atomic number 89-103 are called

                 Actinides (Radio active rare earths)

• 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 colored 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 of clock

                 Radium

• Radium and Plutonium are discovered by

                 Marie Curie

• Metal which shows least expansion

                 Caesium

• Element having highest electro negativity

                 Fluorine

• Element having least electro negativity

                 Francium, Caesium

• Most electro positive stable element

                 Caesium

                                                                                 (To be Continued...)