2007-01-05 13:56:56 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
I don't think you are going to be able to answer this one with a definitive answer. You can say there are 24 in the stable isotope of Scandium.
The number of neutrons present in any kind of atomic nucleus is not fixed. All atoms have a set of variants called isotopes in which the proton number is the same but the neutron number is different. The great bulk of iron (92%) has 30 neutrons coupled to its 26 protons, but 6% has 28 neutrons, 2% has 31 and a small remainder 32 neutrons. Some elements, like scandium, have but one stable isotope. Tin, with 10, holds the record number.
2007-01-05 15:37:24 · answer #1 · answered by ebush73 5 · 0⤊ 1⤋
Mass number = protons + neutrons.
Sc is atomic number 21 = how many protons does it have?
The most abundant isotops is Sc-45. This means
protons + neutrons = 45
So, how many neutrons does it have?
2007-01-05 14:00:52 · answer #2 · answered by The Old Professor 5 · 0⤊ 0⤋
Scandium is stable with 24 neutrons.
This is the one naturally occurring scandium (45Sc). It´s atomic mass is of 44.955912(6) g/mol.
2007-01-05 14:12:27 · answer #3 · answered by anac 3 · 1⤊ 0⤋
scandium 45- only stable nucleide in nature
24 neutrons
2007-01-05 14:04:34 · answer #4 · answered by breastfed43 3 · 0⤊ 0⤋
21 neutrons
2007-01-05 14:35:20 · answer #5 · answered by ibrar 4 · 0⤊ 2⤋
823000421
or was it 3
2007-01-05 13:58:46 · answer #6 · answered by Yahoo Answer Rat 5 · 0⤊ 3⤋