2006-11-07 07:32:57 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Silicon's elemental number is 14, meaning it has 14 protons. If the atomic weight is 28, then subtracting 14 (the mass of the protons) gives you the solution, 14 neutrons.
Atomic mass = mass of protons + mass of neutrons + a tiny bit of mass from electrons.
Protons and neutrons have nearly the same mass, and electrons have hardly any mass at all.
2006-11-07 07:37:41 · answer #1 · answered by mortis 2 · 0⤊ 0⤋
The mas number of an elemnt is a weighted average of all the isotopes. It is weighted so that the one we have the most of counts more. therefore the most abundant isotope would have the mass as given, rounded off to the nearest whole number. To get neutrons, subtract the atomic number(which is the number of protons) from the mass. Both neutrons and protons weigh 1.
Silicon: 28-14=14 neutrons
2006-11-07 07:53:48 · answer #2 · answered by science teacher 7 · 0⤊ 0⤋
What I would suggest is to go to a public library or if you attend college go to your local campus library and see if they carry the following journal article on Silicon Chemistry. I am certain the article will cover the # of neutrons in the Silicon Isotope Si-28.....
2006-11-07 07:45:39 · answer #3 · answered by E Blizzle 2 · 0⤊ 0⤋
14 neutrons. These pairs its 14 protons; thus called Si-28.
2006-11-07 07:46:29 · answer #4 · answered by titanium007 4 · 0⤊ 0⤋