Learn what mass number means in chemistry and how it differs from atomic number and atomic mass. Get examples of how to find the numbers.| Science Notes and Projects
Learn where the electrons are located in an atom and on the periodic table. Also discover the location of valence electrons.| Science Notes and Projects
Learn about subatomic particles in physics and chemistry. Discover subatomic particles in an atom and fundamental or elementary particles.| Science Notes and Projects
Learn about half-life in physics, chemistry, and biology. Get the definition, formulas, and worked example problems.| Science Notes and Projects
Get the atomic nucleus definition and facts, including a look at what is inside the nucleus of an atom and how big it is.| Science Notes and Projects
Get the definition of electronegativity in chemistry. Learn about the trend of electronegativity on the periodic table of the elements.| Science Notes and Projects
The atom is the unit of matter that identifies a chemical element. Here are 10 interesting atom facts for education and entertainment.| Science Notes and Projects
Learn how hot the Sun is and take a look at the temperature range for different parts of our favorite star.| Science Notes and Projects