Inhoudsopgave
Welke stof is P?
Lijst van chemische elementen
| Atoomnummer | symbool | Naam |
|---|---|---|
| 14 | Si | silicium |
| 15 | P | fosfor |
| 16 | S | zwavel |
| 17 | Cl | chloor |
Wat is de naam van de stof NiS?
Nikkel(II)Sulfide.
Lijst van chemische elementen
| Atoomnummer | symbool | Naam |
|---|---|---|
| 15 | P | fosfor |
| 16 | S | zwavel |
| 17 | Cl | chloor |
| 18 | Ar | argon |
What is francium in chemistry?
Francium is a chemical element with symbol Fr and atomic number 87. It used to be known as eka-caesium. Francium is one of the most unstable of the naturally occurring elements: its longest-lived isotope, francium-223, has a half-life of only 22 minutes.
What is the mass number of the isotope of francium?
Francium atom is an alkali metal atom. A radioactive alkali metal with the atomic symbol Fr, and atomic number 87. The mass numbers of known isotopes are 204-213, 217-224. Its valence is +1. The data from CAS Common Chemistry is provided under a CC-BY-NC 4.0 license, unless otherwise stated.
What is the valence electron of francium?
Francium. It is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine ). The isotopes of francium decay quickly into astatine, radium, and radon. As an alkali metal, it has one valence electron .
How do you make francium?
Francium can be produced by bombarding thorium with protons or by bombarding radium with neutrons. Francium’s most stable isotope, francium-223, has a half-life of about 22 minutes. It decays into radium-223 through beta decay or into astatine-219 through alpha decay. Jefferson Lab, U.S. Department of Energy
