How are isotopes of the same element different?
How are isotopes of the same element different?
Isotopes. An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.
Can isotopes be atoms of different elements?
The atoms of a chemical element can exist in different types. These are called isotopes. They have the same number of protons (and electrons), but different numbers of neutrons. Because different isotopes have different numbers of neutrons, they do not all weigh the same or have the same mass.
Why is it hard to predict leads most common isotope?
Isotopes are the atoms of the same element with the difference in the number of neutrons. Apparently, the atomic masses of some isotopes of lead are the same as that of the elements placed adjacent to it in the periodic table. Therefore, it becomes difficult to exactly predict the common isotope of lead.
What does thulium symbolize?
Tm
Who found Thulium?
Per Teodor Cleve
How was thulium named?
Word origin: Thulium is named for Thule, the earliest name for Scandinavia. Discovery: This rare earth was discovered by Sweedish chemist Per Teodor Cleve in 1879.
Is thulium flammable?
Thulium dust is flammable. Thulium is found with other rare earths in the minerals gadolinite, euxenite, xenotime and monazite.
Where is lutetium found?
Lutetium is never found in nature as the free element. Lutetium is found in the ores monazite sand [(Ce, La, etc.) PO4] and bastn°site [(Ce, La, etc.)(…Abundances of lutetium in various environments.
| Location | ppb by weight | ppb by atoms |
|---|---|---|
| Human | (no data) | (no data) |
What is thulium melting point?
2,813°F (1,545°C)
What has an atomic number of 69?
thulium
Is thulium radioactive?
Bombarded by neutrons, natural thulium becomes radioactive thulium-170 (128.6-day half-life), which ejects soft gamma radiation with wavelength commensurate with laboratory hard X-ray sources. Only one allotropic (structural) form is known for thulium.