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.
There are different ideas of what an electron is. One idea syas that an electron is part of an atom. Depending on the kind of atom, an atom can have 1 to 103 electrons. Each electron is extremely tiny. The mass (weight) of an electron is approximately equal to 1/1836 that of a hydrogen atom, which has one electron and one proton, so an electron is 1/1836th the size of a proton. Electrons carry a small electronically negative charge. In this model, electrons are in constant motion around the center of the atom.