Skip to main content
If you continue browsing this website, you agree to our policies:
General usage policy
Continue
x
Print this chapter
Lesson 1: Elements and Atoms
7. Self-Check Assessment
Example 1: How to calculate the number of protons, neutrons and electrons.
SC1. Calculate the number of protons, neutrons and electrons for Na and Na+
Na= 11p, 12n, 11 e. Na+= 11p, 12n, 10e.
Example 2: How to draw Bohr's energy-level diagrams.
SC2: Draw energy level diagram for Ne, and Fr
Ne has 2 energy levels, 8 valence electrons. Fr has 7 energy levels, 1 valence electron