What is the alpha decay of lead-208?
Polonium-212
Polonium-212 undergoes alpha decay to produce lead-208, which means that it gives off alpha radiation, i.e. alpha particles.
What is the symbol for alpha decay?
α
Alpha particle
| Alpha decay | |
|---|---|
| Composition | 2 protons, 2 neutrons |
| Statistics | Bosonic |
| Family | l |
| Symbol | α, α2+, He2+ |
What is beta decay of 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.
What does the 208 in lead-208 represent?
The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series, terminates with the thallium isotope 205Tl.
What element is polonium 208 decay when it emits an alpha particle?
lead
Because polonium is highly radioactive—it disintegrates to a stable isotope of lead by emitting alpha rays, which are streams of positively charged particles—it must be handled with extreme care.
Which one is a symbol for an alpha particle?
(Or α-particle; symbol 2He4.) Physically indistinguishable from the nucleus of a helium atom—two protons and two neutrons bound together by nuclear forces—but usually restricted to the product of nuclear reactions.
When U 238 decays by emitting an alpha particle What is the atomic number of the resulting nucleus What is the resulting atomic mass?
Explanation: Uranium-238 produces thorium-234 by alpha decay. An α-particle is a helium nucleus. It contains 2 protons and 2 neutrons, for a mass number of 4.
What is emitted during alpha decay?
In alpha decay, a positively charged particle, identical to the nucleus of helium 4, is emitted spontaneously. This particle, also known as an alpha particle, consists of two protons and two neutrons. It was discovered and named by Sir Ernest Rutherford in 1899.
What element does rn 222 decay into?
polonium-218
Radon-222 itself alpha decays to polonium-218 with a half-life of approximately 3.82 days, making it the most stable isotope of radon.
What is the chemical symbol for francium?
The chemical symbol for Francium is Fr. Francium is an alkali metal, that has one valence electron. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Francium is a highly radioactive metal that decays into astatine, radium, and radon.
What is the subscript of the α decay of polonium-208?
Write a balanced nuclear equation for the α decay of polonium-208. The superscript of X must be 208 – 4 = 204. The subscript of X must be 84 – 2 = 82. Element 82 is Pb.
What is the number of electrons in the neutral atom of francium-223?
Francium-223 is composed of 87 protons, 136 neutrons, and 87 electrons. The number of electrons in an electrically-neutral atom is the same as the number of protons in the nucleus. Therefore, the number of electrons in neutral atom of Francium is 87.
Is francium radioactive?
Francium is a chemical element with the symbol Fr and atomic number 87. Prior to its discovery, it was referred to as eka-caesium.It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes.