IAS IPS TNPSC GROUP-I, II & IV, VAO, BANK PO CLERK, RAILWAY, SSC, POLICE, SUB INSPECTOR, TRB EXAM COACHING CENTRES IN COIMBATORE TIRUPUR AND TIRUNELVELI
DONT TOUCH PEN, ONLY MIND CALCULTIONS WITHIN 40 SECS.
SHANMUGAM IAS ACADEMY
REGULAR TEST GOOD RESULT
Wednesday, February 20, 2013
John Dalton (1766- 1844)
He was an English chemist. When different types of atoms combine, they obey certain simple laws. Dalton’s atomic theory explains these laws in a simple way. He also gave a theory of colour blindness.
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