Ch.6 The periodic table Flashcards
What are the reasons for the classification of elements?
Pg 114
What is Dobereiner’s Law of Triads?
Pg 114
What are some examples of traids?
- Li, Na, K
- Cl, Br, I
- Ca, Sr, Ba
What was the achievement of traids classification?
Pg 115
What are the reasons for rejecting the triads classification?
Pg 115
What is the Newland’s Law of Octaves?
Pg 115
What were the achievements of Newland’s classification of octaves?
Pg 115
What are the reasons for rejecting the Newland’s classification of Octaves?
Pg 115
What is a periodic table and who arranged the elements in that form?
Pg 116
Dmitiri Invanovich Mendeleev
What are the basis of Mendeleev’s periodic classification?
Pg 116
What are the achivements of Mendeleev’s periodic table?
Pg 116
What are the defects of Mendeleev’s periodic table?
Pg 117
What is Mendeleev’s Periodic Law and Mendeleev’s Periodic Table?
Pg 116
Why the word ‘periodic’ is used as the name of such a table?
Pg 116
What is the difference between Mendeleev’s periodic table and the Modern Periodic table?
The atomic weight in Mendeleev’s periodic table is replaced by atomic number in Modern periodic table.
What is a quantam number?
The number of outermost shell as counted from nucleus.
What are the merits of modern periodic table?
Pg 120
What are the defects of modern periodic table/
Pg 120
The elements in group 17 or VII A are called_____. They are__________.
Halogens
F, Cl, Br, I
The elements in group 1 or I A are called_____. They are__________.
Alkali metals
The elements in group 2 or II A are called_____. They are__________.
Alkalines earth metals.
The elements in group 18 or zero are called_____. They are__________.
Inert of rare gases
