The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to:

Which of the following groups of elements gain elements easily?

The smallest ionic radius amongst the following is 

What is the electronic configuration of the d-block elements?

The electro negativity of the following elements increases in the order

Which of the following is the largest in atomic size?

Which of the following has the largest radius?

The cause of periodicity is