Nuclei+Activity

Nuclei Activity (Textbook pages 129,130, 137, 128 & 134)

Model or represent the particles in the nuclei of the 20 lightest elements. Then organize the elements in a logical order. Only represent the particles in the nuclei.

1. What is found in the nuclei of atoms?

2. What is the mass of a proton? neutron? (amu)

3. What two particles make up 99.9 percent of an atoms mass?

4. Compare atomic mass number and atomic number.

Atomic mass number is the mass of an atom's ............ and ........, but atomic number is only the mass of the ............

5. How can you determine the number of neutrons in an atom of an element using the periodic table?

Atoms Facts