1 Select Advanced from the left menu of the Editor options dialog. 2  Scroll down to Display email contents section (near the bottom). 3  Uncheck the box to Show picture placeholders. 4  Then click OK to apply and close the dialog.n Outlook 2010 you need to follow these steps to enable images to be seen in emails. When the Options window opens, select Trust Center from the left side of the window. From the right side of the page, click the Trust Center Setting... button. From the left side of the page, select Automatic Download.
The electron was first discovered in 1898 by Sir John Joseph Thomson. Almost 100 years ago J.J. Thomson was at Cavendish Laboratory at Cambridge University. Thomson was investigating 'Cathode Rays' which had been a puzzle for a long time.
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.In 1886 French physicist Antoine Bequerel first discovered radioactivity.Thomson student from New Zealand Ernest Rutherford named three types of radiation; alpha, beta and gamma rays.n 1894 Sir William Ramsay and Lord Rayleigh discovered the noble gases, which were added to the periodic table as group 0. In 1897 English physicist J. J. Thomson first discovered electrons; small negatively charged particles in an atom. John Townsend and Robert Millikan determined their exact charge and mass.