Question

What is meant by? a.Group b.A period c.Transition elements d.Isotope

Answer 1

Heya friend!!
Rajdeep here...

a) A group is the vertical section present in the Periodic table. There are 18 groups in total.

b) A period are the horizontal rows present in the periodic table. There are 7 periods in total.

c) Transition elements are the elements which are present between group IIIB to IIB (in the d block)

d) An isotope of an element is the atom of the same element with same atomic number but different mass number.

Thanks!!