2007-01-29 14:49:17 · 4 answers · asked by soundprovider 1 in Science & Mathematics ➔ Chemistry
*how can you find out the number of neutrons as well?
2007-01-29 14:53:07 · update #1
*how to find out the number of electrons as well depending on that elements combining capacities?
2007-01-29 14:55:02 · update #2
*how to find out the number of electrons as well depending on that elements combining capacities?
2007-01-29 14:55:07 · update #3
The mass number of an isotope is the number of protons + the number of neutrons. A given element always has the same number of protons but isotopes of an element differ in the number of neutrons they have. Wikipedia has a pretty good description.
2007-01-29 14:56:05 · answer #1 · answered by GatorGal 4 · 0⤊ 0⤋
Isotopes of an element have nuclei with the same number of protons (the same atomic number) but different numbers of neutrons. Therefore, isotopes have different mass numbers, which give the total number of nucleons—the number of protons plus neutrons.
2007-01-29 14:52:41 · answer #2 · answered by Jeff W 2 · 0⤊ 0⤋
number of protons + number of neutrons
Note: The number of electrons is not included as the mass of an electron is ridiculously tiny when compared to that of a proton or neutron
2007-01-29 14:54:51 · answer #3 · answered by Anonymous · 0⤊ 0⤋
number of protons + number of nuetrons
2007-01-29 14:51:28 · answer #4 · answered by applejacks 3 · 0⤊ 0⤋