Which fact is not valid for Dobereiner's triads? – McqOptions

MCQOPTIONS

1.	Which fact is not valid for Dobereiner's triads?
A.	The atomic weight of middle element is roughly average of the other two elements
B.	The properties of middle element is roughly average of the other two elements
C.	The elements of triads belong to the same group of modem periodic table
D.	The elements of triads have same valency electrons.
Answer» C. The elements of triads belong to the same group of modem periodic table

Discussion

No Comment Found

Related MCQs

Which of the following statements, is not correct, about glass?
The cathode ray experiment was done for the first time by
The nucleus of an atom contains
The number of electron in an element with atomic number X and atomic mass Y will be
Which of the following has a charge of+1 and a mass of 1 amu?
Soft soaps are
The atomic number of an element is 11 and its mass number is 23. The correct order representing the number of electrons, protons and neutrons respectively in this atom is
Which would be the electrical charge on a sulphur atom containing 18 electrons?
Which of the statements about glass are correct? 1. Glass is a super-cooled liquid having infinite viscosity. 2. Violet coloured glass is obtained by adding \[Mn{{O}_{2}}\]. 3. Glass is a man-made silicate. 4. Glass is a crystalline substance. Select the correct answer using the codes given below.
Which one among the following is the main ingredient in cement?