# Atomic number ranges in "integral units"?

My textbook says the following:

For an electrically neutral or complete atom, the atomic number also equals the number of electrons. This atomic number ranges in integral units from 1 for hydrogen to 92 for uranium, the highest of the naturally occurring elements.

I'm wondering what is meant by "integral units" in this context?

I would greatly appreciate it if people could please clarify this.

• It means the said number can be 1, or 10, or 25, but never 1.5. May 2, 2019 at 20:45
• No, it should be just integers. "Integral number" looks like literal translation from another language. May 2, 2019 at 21:03
• If the author has used "integral units of charge" it would have been much better. Definition 1b(1) at Merriam-Webster.
– MaxW
May 2, 2019 at 22:57
• @ThePointer Integral can be used to mean "of or relating to integers". An example of this usage in mathematics is the concept of an integral domain
– Tyberius
May 3, 2019 at 0:21
• @ThePointer "discrete" is not the same thing as "integers"; 1, 1.1, 1.2, 1.3 ... is discrete. I also second what Tyberius has said. May 3, 2019 at 14:33