1: Pre-lecture Overview: Light and Matter
Part a) Drag words from the left to the correct blanks at the right.
You may use the same words more than once.1. Each chemical element has a unique ____.
2. An atom with more electrons than protons has a negative ____.
3. The sum of the number of protons and neutrons in an atom is called the ____.
4. Most hydrogen atoms have only a single proton in their nucleus, so a hydrogen atom that also has one neutron is an ____ of hydrogen.
5. The number of protons in an atom is called the atom's ____.
