The Atomic Mass of the radium isotope 226Ra is 226,025 409 8(25).
88
The mass number 228 isotope of radium has 88 protons and 140 neutrons. It is a radioactive element with a half-life of about 5.75 years, decaying into radon-220 through alpha decay. Radium-228 is used in medical treatments and research.
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of an isotope - 88
The density of radium at about room temperature is 5.5  g·cm−3. That's 5.5 grams per cubic centimeter, or 5.5 grams per milliliter. A link to the Wikipedia article on radium is provided.
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass - 88 The most stable and known isotope of radium, 226Ra, has 138 neutrons.
The most stable isotope of radium - 226Ra - has the atomic mass 226,025 409 8 (25).
88
The mass number 228 isotope of radium has 88 protons and 140 neutrons. It is a radioactive element with a half-life of about 5.75 years, decaying into radon-220 through alpha decay. Radium-228 is used in medical treatments and research.
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass of an isotope - 88
The density of radium at about room temperature is 5.5  g·cm−3. That's 5.5 grams per cubic centimeter, or 5.5 grams per milliliter. A link to the Wikipedia article on radium is provided.
Radium has 88 electrons. The number of neutrons is different for each isotope: Number of neutrons = Atomic mass - 88 The most stable and known isotope of radium, 226Ra, has 138 neutrons.
Radium 226--------alpha particle-------- Radon 222
Atomic number of uranium: 92 (the same for all the isotopes) Atomic number of an element = number of protons = number of electrons Atomic mass of the isotopes of uranium: 234, 235, 236, 238, 239, 240, ...., etc. Atomoc mass - Atomic number = Number of neutrons
The atomic mass of the most common isotope of radium (226Ra) is: 226,025 409 8(25).
The atomic mass of radium is approximately 226 atomic mass units.
Radium has 88 protons. The atomic mass of the most stable radium isotope - 226Ra - is 226,025 409 8(25).
When thorium-230 decays by emitting an alpha particle, it transforms into radium-226. This decay process reduces the mass number by 4 and the atomic number by 2.