Atomic number and mass number are always whole numbers because they are obtained by counting whole objects (protons, neutrons, and electrons). The sum of the mass number and the atomic number for an atom (A-Z) corresponds to the total number of subatomic particles present in the atom. The...
Gallium is a bright blue-silver metal with a melting point low enough you can melt a chunk in your hand. Here are interesting facts about this element. Gallium Basic Facts Atomic Number:31 Symbol:Ga Atomic Weight:69.732 Discovery:Paul-Emile Lecoq de Boisbaudran 1875 (France) Electron Configu...
Since atomic number is the number of protons in anatomand atomic mass is the mass of protons, neutrons, and electrons in an atom, it seems intuitively obvious that increasing the number of protons would increase the atomic mass. However, if you look at the atomic masses on aperiodic table, ...
The atomic number for indium is 49, which means that the nucleus of its atom houses 49 protons and elections each. The atomic mass, which is... Learn more about this topic: Indium: Element Facts, Discovery & Isotopes from Chapter 13/ Lesson 2 ...
Magnesium Basic Facts Atomic Number:12 Symbol:Mg Atomic Weight:24.305 Discovery:Recognized as an element by Black 1775; Isolated by Sir Humphrey Davy 1808 (England). Magnesium first came into use as magnesium sulfate or Epsom salt. The story goes that in 1618 a farmer in Epsom, England could...
Instead there was an expression on the other’s face oddly reminiscent of a parent about to lecture an offspring on some of the unpleasant facts of life. “Basically,” said Williamson as he gently peeled back a field dressing of a wounded DBLF, “your trouble is that you, and your ...
Fast Facts: Strontium Element Name: Strontium Element Symbol: Sr Atomic Number: 38 Appearance: Silvery-white metal that oxidizes to pale yellow Group: Group 2 (Alkaline Earth Metal) Period: Period 5 Atomic Weight:87.62 Electron Configuration:[Kr] 5s2 ...
Define Atomic value. Atomic value synonyms, Atomic value pronunciation, Atomic value translation, English dictionary definition of Atomic value. n. Symbol Z Abbr. at. no. The number of protons in an atomic nucleus. American Heritage® Dictionary of the
Fast Facts: Atomic Number 4 Element Name: Beryllium Element Symbol: Be Atomic Number: 4 Atomic Weight: 9.012 Classification: Alkaline Earth Metal Phase: Solid Metal Appearance: White-Gray Metallic Discovered By: Louis Nicolas Vauquelin (1798) Element Facts for Atomic Number 4 The element with a...
Here's a collection of useful and interesting argon facts. Argon is the noble gas with element atomic number 18 with element symbol Ar.