2006-11-16 12:20:35 · 9 answers · asked by siedeah_howard 1 in Science & Mathematics ➔ Chemistry
To find the number of neutrons you take the atomic mass in this case 20.180 and then subtract the elements atomic number in this case 10. SO 20.180-10 = 10.180 and since the number with the fewest significant digits has two your answer is 10 neutrons for Neon.
2006-11-16 13:55:50 · answer #1 · answered by Anonymous · 0⤊ 0⤋
This is not really a fair question. Individual atoms have whole number atomic masses, so for example, neon-20, has a mass of 20. Since the atomic number is 10, and each proton weighs one, the rest of the mass must come from the neutrons. In this case the neon atom has 10 neutrons. Try this one: oxygen-17 is an rare isotope of oxygen. Since the atomic number is 8, the rest of the mass of this atom comes from the neutrons. So how many are there?
Answer: 9
2006-11-16 12:29:35 · answer #2 · answered by Aunty Pat 5 · 0⤊ 0⤋
10.
I will show my way to get this answer.
As we know, an element is basically form by 3 different particles, neutrons, protons and they are surrounded by electrons. The neutron does no have any charge but has an atomic mass ~1.00g/mol. Protons also has an atomic mass ~1.00g/mol. The electrons is too light we can assume that it has no affect in calculating the atomic mass.
element 10(Neon), has an atomic mass 20.180, we knew it is approximately 20. Also we knew 10 of them came from the 10 protons (atomic number is 10), so there must be 10 neutrons.
2006-11-16 12:45:23 · answer #3 · answered by Anonymous · 0⤊ 0⤋
If you have the atomic number and the atomic mass, you can find the number of neutrons by finding the difference.
20.180~20
20 - 10 = 10
So 10 neutrons
2006-11-16 12:30:02 · answer #4 · answered by Justin 2 · 0⤊ 0⤋
Atomic Mass=Number of Nutrons+Number of Protons Atomic Number=Number of Protons
2016-03-28 22:59:08 · answer #5 · answered by ? 4 · 0⤊ 0⤋
Both neutrons and protons have masses of about 1 AMU each. If the atomic number of any nuclide is n and its mass is M, then the number of neutrons is M-n. In this case, 10.
2006-11-16 12:30:37 · answer #6 · answered by Luha 3 · 0⤊ 0⤋
Atomic mass = # of protons and neutrons put together
Atomic number = # of protons
to find the number of neutrons, subtract
20.180-10 = 10.180 neutrons, but you cant have .180 neutrons so the answer is 10.
2006-11-16 12:33:44 · answer #7 · answered by scurvybc 3 · 0⤊ 0⤋
It depends on the isotope. But the most common isotope of neon has 10 neutrons in the nucleus.
2006-11-16 12:26:54 · answer #8 · answered by WillyC 5 · 0⤊ 0⤋
If I remember correctly, it's atomic mass-atomic #
2006-11-16 12:29:06 · answer #9 · answered by Rawr_Kitty 3 · 0⤊ 0⤋