What is the atomic number of tr?
69
Fact box
| Group | Lanthanides | 1545°C, 2813°F, 1818 K |
|---|---|---|
| Period | 6 | 1950°C, 3542°F, 2223 K |
| Block | f | 9.32 |
| Atomic number | 69 | 168.934 |
| State at 20°C | Solid | 169Tm |
What is the atomic mass of oxygen-18?
17.999160
CHEBI:33815 – oxygen-18 atom
| ChEBI Name | oxygen-18 atom |
|---|---|
| ChEBI ID | CHEBI:33815 |
| Definition | The stable isotope of oxygen with relative atomic mass 17.999160 and 0.205 atom percent natural abundance. |
| Stars | This entity has been manually annotated by the ChEBI Team. |
| Supplier Information | No supplier information found for this compound. |
What is the atomic mass of tellurium?
127.6 u
Tellurium/Atomic mass
What is the difference between o16 and o18?
Oxygen-16 and oxygen-18 differ in the number of neutrons in their nuclei. Oxygen-16 has 8 neutrons, while oxygen-18 has 10 neutrons.
What is BA in the periodic table?
barium (Ba), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table.
What is CL on the periodic table?
chlorine (Cl), chemical element, the second lightest member of the halogen elements, or Group 17 (Group VIIa) of the periodic table. Chlorine is a toxic, corrosive, greenish yellow gas that is irritating to the eyes and to the respiratory system.
How is oxygen-18 formed?
Oxygen is composed of 8 protons, and in its most common form with 8 neutrons, giving it an atomic weight of 16 (16O) — this is know as a “light” oxygen. It is called “light” because a small fraction of oxygen atoms have 2 extra neutrons and a resulting atomic weight of 18 (18O), which is then known as “heavy” oxygen.
What is the protons of oxygen-18?
8
Oxygen-18/Protons
All oxygen atoms have 8 protons, but the nucleus might contain 8, 9, or 10 neutrons. “Light” oxygen-16, with 8 protons and 8 neutrons, is the most common isotope found in nature, followed by much lesser amounts of “heavy” oxygen-18, with 8 protons and 10 neutrons.
What is the atomic mass of polonium?
84
Polonium/Atomic number
What is the atomic number of rubidium?
37
Rubidium/Atomic number
What oxygen isotope has 9 neutrons?
oxygen 17
Because protons and neutrons are roughly equal in mass, an isotope’s number is equal to the sum of its protons and neutrons. Therefore, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.
What is o18 used for?
Oxygen-18 in the water or gaseous form serves as a source for short-lived positron-emitting isotope fluorine-18, which allows tracking the processes of cerebral blood flow, glucose metabolism in the central nervous and cardiovascular systems, evaluating the impact of drugs on neuroreceptors.