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How many neutrons does an atom with a mass of 13 and 9 protons?
Wiki User
∙ 13y ago
the Atomic Mass of carbon 13 is 13 lt has six protons how many neutrons does this isotope
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoApproximately 9+11=20amu. (electron's mass is negligible)
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If an atom has an atomic number of 8 and a mass of 18 how many protrons are in the atom?
It has 8 protons. The atomic number of an atom = the number of protons. The mass number is not needed in this problem. The mass number is the number of protons + number of neutrons.
The mass number of an atom of calcium with 20 protons and 20 neutrons is?
40, the sum of the protons and neutrons.
What is the mass number of a atom?
the mass number is number of protons in an atom, plus the number of neutrons.
What is equal to the total number of protons and neutrons?
If you add the number of protons to the number of neutrons in an atom, you have calculated that atom's atomic mass.
The mass number of an atom is found by adding the?
protons and neutrons
What particles are used to determined the mass of an atom?
Mass of an atom = mass of protons + mass of neutrons
If the atomic mass of an atom is 38 and the atom contains 15 protons how many neutrons does the atom contain?
Protons and neutrons each have an atomic mass of 1 So, 38-15=23 Neutrons
What is the total amount of protons and neutrons in an atom?
The total amount of protons and neutrons in an atom is its mass number.
How many protons and neutrons does a carbon atom with a mass number of 12 have?
6 protons and 6 neutrons.
What particles make up the mass of an atom?
The number of protons
What is the sum of protons neutrons in an atom?
Mass number = Protons+Neutrons
If the atomic mass of an atom is 48 and the atom contains 20 protons how many neutrons does the atom contain?
28. Atomic mass - Atomic # (same as the number of protons) = number of neutrons
Which subatomic particles makes up most of the mass off the atom?
The major contribution to the mass of an atom is from protons and neutrons; electrons have a known but negligible mass.
What is the sum of protons and neutrons in an atom?
Mass number!:)
A Lithium atom has an atomic mass of 6 How many neutrons does this atom have?
This atom has three neutrons. The atomic mass number is the sum of the protons and neutrons. All atoms of the same element have the same number of protons (lithium has three), so the neutrons have to account for the rest of the mass. 6 (the mass number)-3 (the number of protons in a lithium atom)=3. So this atom must have three neutrons.
What is the mass number of 10 protons and 10 neutrons?
20. the mass of an atom is determined by the sum of the number of neutrons and protons the atom has.
Which particles account for most of the atoms mass?
Physics has not managed to discover a particle that accounts for mass
