a) What is meant by atomic radius?
b) Explain covalent radius.
c) Write down anothertwo types of terms expressed as atomic size.

Write down the expression for nuclear radius

What does atomic radius and ionic radius really mean to you?

The atomic radius increases as we move down a group because

The spontaneity of a process is expressed in terms of a change in Gibbs energy. a) What is meant by a change in Gibbs energy of a system? b) How is it related to the enthalpy and entropy of a system? c) How is it useful in predicting the feasibility of a process?

The outermost electronic configuration of an element is 3s^2 3p^4 a) Find the atomic number of this element. b) Write down the group in which this element belongs to? c) Write down the outermost subshell elctronic configuration of the inert gas which belongs to the same period of the given element.

Covalent bond is formed by the overlaping of atomic orbitals. What are the 3 types of overlapping ?

Mendeleev arranged the elements in the order of increasing atomic weights. a) Write down the merits of Mendeleevis periodic table. b) What are the demerits of Mendeleev's periodic table?

Cut a small sodium metal plece into two watch it. a) What change occurred on the surface of sodium metal? b) Write one word for the process of this type of decomposition. c) Write down the equation for this