Choose from the following. 6C, 8O, 10Ne, 11Na, 14Si (i) Elements that should be in the same period.

Which group of elements could be placed in Mendeleev's Periodic Table without disturbing the origina

Identify and name the metals out of the following elements whose electronic configurations are given

What is atomic radius? Why does atomic radius decrease across a period?

Give reasons: (i) The elements of group 18 are called zero valent. (ii) Group 17 elements form unine

What do you understand by the term periodicity? Does the periodicity in properties is a function of

Name the element which is in (i) First group and third period (ii) Seventeenth group and second peri

Arrange the following elements in the increasing order of their metallic character Mg, Ca, K

If an element X is placed in group 14, what will be the formula and the nature of bonding of its chl

Write the formulae of chlorides of Eka-silicon and Eka-aluminium, the elements predicted by Mendelee

How many vertical columns are there in the Modern Periodic Table?

Define groups in periodic table.

What was the drawback of the Law of Octaves?

State Newlands' Law of Octaves.

State Mendeleev's Periodic Law. [CBSE 2019]

What was Dobereiner's basis of classifying elements?

Explain why, the direction of induced current in the coil of an A.C. generator changes after.....

A coil of insulated copper wire is connected to a galvanometer. What will happen if a bar magnet...

Name two safety measures commonly used in domestic electric circuits and appliances.

What precautions should be taken to avoid overloading of domestic electric circuits ?