The second period elements show anomalous behaviour.
a) Give reason.
b) What are the anomalous properties of second period elements?

Name the element showing anomalous behaviour in group 2.

Give reason for anomalous behaviour in group 2.

What is the time period of a second’s pendulum?

Which are the electrons shows the chemical properties of elements?

Give two examples to show the anomalous behaviour of fluorine.

Accounting from the following : 2nd period elements show anomalous behaviour

Assertion : All isotopes of a given element show the same type of chemical behaviour. Reason : The chemical properties of an atom are controlled by the number of electrons in an atom.

Name of elements with atomic numbers greater than 100 are given by IUPAC the first inoisation enthalpies of second period element generally increase from lewft to right along the period. Give reason for this general trend.

2. Some d - block elements are given below: (Cr,Mn,Fe,Cos,Ni) a. Identify the element which shows maximum paramagnetic behaviour: b. Give reason for the highest paramagnetic property of that element. c. When two electrons, are Iost from each atom, is there any change:in' magnetic properties of - each. Explain?

State the modern periodic law of elements.