Five elements and have atomic number and respectively. Answer the following questions.
(i) Which element forms positive ions?
(ii) Which element has five electrons in the valence shell?
(iii) Which element has the highest electron affinity?
(iv) Which element has the highest ionisation potential?
(i) Which element forms positive ions?
Important Questions on Periodic Properties and Their Variations
Where would you locate the following element in the periodic table?
A soft metal stored under kerosene.
Properties of the elements are given below.
Where would you locate the following element in the periodic table?
An element with variable (more than one) valency stored under water.
Where would you locate the following element in the periodic table?
An element which is tetravalent and forms the basis of organic chemistry.
Where would you locate the following element in the periodic table?
An element which is an inert gas with atomic number .
Properties of the elements are given below.
Where would you locate the following element in the periodic table?
An element whose thin oxide layer used in other element corrosion resistant by the process of anodising.
The element of one short period of the periodic table is given below in the order from the left to right.
(i) To which period do these elements belong?
(ii) One element of this period is missing. Which is the missing element, and where should it be placed?
(iii) Which one of the elements in this period shows the property of catenation?
(iv) Place fluorine, beryllium, and nitrogen in the increasing order of electronegativity.
(v) Which one of the above elements belongs to the halogen series?
Atomic radius.
