Windows has a Sound window that allows you to manage your computer's audio settings and devices. If you cannot hear sound when it should be playing, head to the Sound window and tell Windows to select the audio input device you are using. 1. Click the Start button and type mmsys.cpl..
The atomic number of lead is 82. That tells us that electrically neutral lead has 82 protons and 82 electrons. The three stable isotopes of lead are 206 Pb, 207 Pb, and 208â¦ Pb. These isotopes have 124, 125, and 126 neutrons per each atom, respectively.
The atomic weight is close to the number of protons and neutrons in the atom because electrons have very little mass. Lead, abbreviated Pb, is element number 82 with the corresponding atomic weight of 207.2. This is converted to grams using the constant 6.0221419828e+23. Thirty-six elements are heavier than lead, and ununoctium is the heaviest element. Learn more about Measurements