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Related to atomic number: Isotopes, atomic weight


Fifth letter of a Nasdaq stock symbol indicating that listing is a fifth class of preferred stock, a stub, a certificate representing a limited partnership interest, foreign preferred when issued, or a second class of warrants.


1. A symbol appearing next to a stock listed on NASDAQ indicating that the share being traded has a miscellaneous right, warrant, or receipt attached to it. All NASDAQ listings use a four-letter abbreviation; if a Z follows the abbreviation, it indicates that the share's category does not easily fit into other categories.

2. In over-the-counter trading, a symbol meaning that no quote is available for a security.

3. On a table, a symbol indicating an exact number, instead of an estimate, of securities traded.


1. Used in stock transaction tables in newspapers to indicate that the volume reported is the actual number of shares transacted, not the number of round lots: z150.
2. Used in over-the-counter stock transaction tables to indicate that no representative quote is available: z.
References in periodicals archive ?
Encourage students to consider any patterns they saw and to think carefully before writing down three reasons why the atomic number affects the number of electron layers, or shells.
Which is the only chemical element where its atomic number is equal to exactly twice its calculated sum?
Scerri thinks that the periodic table should be widened to have 32 columns so that the f-block elements can merge into the main table, and all elements would be displayed in order of atomic number.
Actinides are a series of chemically similar metallic elements with atomic numbers ranging from 89 (actinium) to 103 (lawrencium).
With a nuclear charge of 114 it should have 179 neutrons (A = 293) whereas 184 neutrons has atomic number 116.
I will name the element and you give me the atomic number.
Hence he proposed three "corrections" to the measured intensity: for absorption, atomic number effect, and fluorescence (from characteristic lines only).
For elements with an atomic number greater than 10, the detection limit is about 1 to 2% by weight, with quantitative accuracy for concentration data ranging from 2 to 5%, depending on how the data is acquired.
Hafnium has an atomic number of 72, and its discovery reduced the number of still-missing elements between 1 and 92 to five.
One limitation of PIXE is that the elastomer could still be a synthetic rubber if the catalyst used to polymerize it were a low atomic number element such as lithium.
Copper is a chemical element in the periodic table that has the symbol Cu and atomic number 29.
Which element has the atomic number 78 and the chemical symbol Pt?