Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Elemental Symbol - Calculating Protons, Neutrons and Electrons
Document related concepts
Transcript
MASS NUMBER number of protons + neutrons 197 Au 79 ELEMENT'S SYMBOL ATOMIC NUMBER number of protons For the atom above: number of protons = _________ number of electrons = _________ number of neutrons = _________ number of protons = _________ number of electrons = _________ number of neutrons = _________ Examples: 35 Cl 17 65 Zn 30 number of protons = _________ number of electrons = _________ number of neutrons = _________ The periodic table given to you at the start of the unit is a very useful tool. It actually tells us the number of electrons, protons and neutrons in an atom. Atomic number - given to you on the top right hand corner Mass number - round off the atomic weight at the bottom Note that once you have the atomic number you know the number of electrons which is also equal to the number of protons. In order to find the number of neutrons, you subtract the atomic number from the mass number.
