Google. 1  Crunch Report | Juicero Runs Out Of Juice. 2  Googleâs Search app on iOS gets a Twitter-like Trends feature, faster Instant Answers. 3  Google reveals the top things people want to find out âHow toâ do. 4  Browse more...
The definition of an atomic number is the number of protons in the nucleus of an atom of an element. Three for lithium and 20 for calcium are each an example of an atomic number.
The total number of electrons in an atom is always the same as the number of protons in the nucleus. This means atoms have no overall electrical charge. The number of protons in an atom is called its atomic number atomic number: The number of protons in the nucleus of an atom.