Promethium is one of the lanthanoids, atomic number 61, period 6.
Promethium has similar chemical properties as cerium; the oxidation state is 3+.
fact family are related facts Number family are related numbers
A herd is a large number of deer family.
The family number of lithium is 1, as it belongs to the alkali metal family on the periodic table.
In ancestry.com. there are a number of family trees for the Ostara family.
A person can find out their family members social security card number by asking the family member. A social security number should be kept confidential.
oxygen isn't a family name, but the number of the group that oxygen is in is 16
Any number; the name is actinoids family (after IUPAC nomenclature) or actinides.
The largest number of cousins in one family would depend on the number of siblings in the family and the number of children each sibling has. There is no specific limit to the number of cousins in a family.
Promethium, a rare and radioactive element, typically has a metallic luster and a silvery-gray appearance. Its texture is generally smooth and metallic, similar to other metals, but it can also be somewhat brittle. Due to its radioactivity, handling promethium requires precautions to avoid exposure.
Uranium is a member of the actinides (or actinoids) family; no other number.
carbon family or chalcogens