The most unstable species in the Periodic Table among transition and inner transition elements is #43 Technetium (Tc). It is so unstable that it does not occur naturally.
Iron, Cobalt, Copper, Nickel and Titanium are all transition elements (metals.) Transition metals are defined as ones which form at least one species which has partially filled d orbitals.
Protons are positively charged species found inside the nucleus. The number of protons decides what element it is and its position in the periodic table.
Calcium bromide, CaBr2, is a compound. It is not an element, because elements are individual species and they are found in the periodic table. It is not a homogeneous or heterogeneous mixture, because it is a single entity.
there are around 30-50 kinds
4 you dumb dumb
8 to 10 days for most, but there are many species
The basic element of living species is Carbon other are hydrogen and oxygen.
The basic element of living species is Carbon other are hydrogen and oxygen.
Can mate with other individuals of their species and have viable progeny.
Periodic table lists elements and any species like NCS like the one asked in the question.
Compound substances contain more than one species of element. they are formed by chemically combining these species.
Elements are not species. Helium is an element. Helium can be a single atom.