According to Graham for an ideal gas ,

r $\propto$ $\frac{1}{\sqrt{\mathrm{d}}}$

Structure of BF₃ is ;

In this example octet is incomplete .

The bond angle of H₂O2 is 94.8^o .

In ClF₃ molecule , Cl atom is sp³d hybridised and due to the presence of two lone pairs of electrons , it has T-shaped geometry .

Cationic hydrolysis always forms basic solution .

Atomic number of an element is always equal to the number of protons in its atom while mass number is equal to the sum of the number of protons and neutrons .

Total no. of electron which are found around , Kr in KrF₂ are 10 .

Isotopes are the atoms of an element which have same atomic number but different mass number .

Among isoelectronic species , size decreases with increase in nuclear charge .Hence , the order of size is ^_

Mg²⁺ < Na⁺ < O^2-

Sodium acetate is a salt of weak acid and strong base hence its aquous solution is basic .

C-H₃CONa $\stackrel{{\mathrm{H}}_2\mathrm{O}}{\rightleftharpoons }$ $\underset{\mathrm{Weak}}{{\mathrm{CH}}_3\mathrm{COOH}}$ + $\underset{\mathrm{Strong}}{\mathrm{NaOH}}$