243.0614
The isotope with the longest half life is 243Am (half life = 7 370 years) with the atomic weight (Audi et alii, 2003) of 243,061 138 11 +/- 0,000 000 25.
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
Cobalt is an atomic mass of 58.93 atomic mass units
== The equation of atomic mass is protons+nuetrons== atomic mass. ===
The atomic mass unit is not a SI unit. An atomic mass unit is equal to 1/12 from the atomic mass of the isotope 12C.
Atomic number 6, atomic mass 12.
The atomic mass of americium-242 is approximately 242 grams per mole.
IUPAC proposed the atomic weight (243).
Mass number = Number of protons + Number of neutrons For the isotope 241Am the mass number is 241; for 242Am is 242, for 243Am is 243, etc. Americium has isotopes with mass numbers that range from 231 through 249.
The atomic number of americium (Am) is 95.
The atomic number of americium is 95.
There are 19 known isotopes of americium, with neutron counts ranging from 136 to 154. Americium-241, the easiest to produce, has 146 neutrons. Number of neutrons = Atomic weight (rounded) of an americium isotope - 95 Each isotope has a different number of neutrons. Americium has also 95 protons and electrons.
Americium, with the chemical symbol Am, is the chemical element with the atomic number 95.
1. For the atomic mass of americium see the link below. 2. The density of americium is between 12 and 14 g/cm3, after different sources in litterature.
Americium has 95 protons and electrons. Number of neutrons: atomic mass of an isotope - number of protons.
Americium has (all the isotopes) 95 electrons.
Neptunium has the atomic number 93 and americium has the atomic number 95.
Americium has 95 electrons and different isotopes can have different numbers of neutrons. The most common isotope is americium-243, which has 148 neutrons.