The following options depict a particular characteristic of elements and their variation in the period from left to right and top to bottom in the group: Characteristics of the element - left to right in the period-top to bottom in the group
Select the correct option.
A. Electrical positivity / metallic character, - increases / increases - decreases
B. Electrical positivity / metallic character, - increases / increases - increases
C. Electrically positive / metallic character, - decreases / increases - increases
D. Electrical positivity / metallic character, - decreases/ decreases / decreases
Answer: Option C
The law of Octaves' was proposed by:
A. Johann Dobereiner
B. Alexander Newlands
C. Lothar Meyer
D. Dmitri Mendeleev
A. Periodic trends in physical properties of elements
B. Periodic trends in chemical properties of elements
C. Both A and B
D. None of the above
Which of the following resembles the 10th element in Newland's periodic classification?
A. third
B. ninth
C. fourth
D. first
A. law of Triads
B. law of Dobereiner
C. law of Octaves
D. law of Duet

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