MEDIUM
Earn 100

Give the names of 4A group elements

Important Questions on Periodic Table and Periodicity in Properties

EASY
What were the criteria used by Mendeleev in creating his Periodic Table?
EASY
The element named as Eka-boron by Mendeleev was later named as _____.
MEDIUM
According to Mendeleev's periodic law, the elements were arranged in the periodic table in the order of:
MEDIUM
Noble gases belongs to group _____ of periodic table. (16, 17, 18)
HARD
An element X forms an oxide X2O3. In which group of Mendeleev's periodic table is this element placed?
EASY

Among the following elements, _____ does not fit in Dobereiner's traid.

F,Cl, Br, I

HARD
In Mendeleev's periodic table, gap was not left for one of the following elements. This element is:
MEDIUM
_____ was the basis of the classifications proposed by Dobereiner, Newlands and Mendeleev.
EASY

The horizontal rows in a periodic table are called _____.

HARD
Which of the following is/are achievement(s) of Mendeleev's periodic table?
EASY
One mineral (metal) presents in major quantity in milk is _____.
HARD
In Mendeleev's periodic table, gaps were left for the elements to be discovered later on. An element which found a vacant place in the periodic table later on is
MEDIUM
The elements having the same number of _____ occur at regular intervals in the periodic table. (valence electrons / electrons)
EASY

 _____(Mendeleev/Moseley) law states that the properties of elements are periodic function of their atomic masses.

EASY
Vertical columns of elements in the periodic table are called _____.
EASY
Mendeleev’s periodic table is based on atomic _____. (number / mass)
EASY

The element with atomic number 14 is hard and forms acidic oxide and covalent halide.The element belongs to _____ category.