Atomic Structure & Isotopes Worksheet

Atomic Structure Worksheet Name: 1. Name the three particles of the atom and their respective charges are: a. b. c. 2. The number of protons in one atom of an element determines the atoms , and the number of electrons determines of an element. 3. The atomic number tells you the number of in one atom of an element. It also tells you the number of in a neutral atom of that element. The atomic number gives the identity of an element as well as its location on the Periodic Table. No two different elements will have the atomic number. 4. The of an element is the average mass of an elements naturally occurring atoms, or isotopes, taking into account the of each isotope. 5. The of an element is the total number of protons and neutrons in the of the atom. 6. The mass number is used to calculate the number of in one atom of an element. In order to calculate the number of neutrons you must subtract the from the . 7. Give the isotope symbol and number of neutrons in one atom of the following elements. Show your calculations. Barium - 138 Sulfur - 32 Carbon