Dentist : "Iam sorry, madam, but I shall have to charge you Rs 250 for pulling your boy''s tooth."
Woman: "Rs 250! Why? You said you charged only Rs 50 for such work!"
Dentist: "Yes, but this youngster yelled so terribly that he scared four other patients out of the clinic ;->
All da elecTrons were having parTY suddenly proTons aTTacked ThemA herO came & saved da eLecTrons.TheY asKed hero "who r u?"he said "Bond .....Covalent bond"