Since a nucleus contains protons and neutrons, most of the mass of an atom is concentrated in its nucleus.

It also tells us that chlorine has 18 neutrons (35 - 17) and, as the number of electrons and protons are equal in a neutral atom, chlorine also has 17 electrons. The relative mass of a nucleus is ...

The use of artificial intelligence (AI) scares many people as neural networks, modeled after the human brain, are so complex ...

Accompanying Lesson Plan: Lesson 3.2: Finding Volume—The Water Displacement Method The chart shows that atomic size and mass for the first 20 elements in the periodic table. The size of the atoms and ...