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The mass number is the total weight of neutrons and protons in the nucleus of an atom.
What else can I help you with?
What is the mass number of an isotope o this atom that has has 2neutrons?
The mass number of an isotope is the sum of its protons and neutrons. If the atom has 2 neutrons, you would need to know the number of protons (which defines the element) to calculate the mass number. For example, if the atom has 6 protons (like carbon), the mass number would be 6 protons + 2 neutrons = 8. Therefore, the mass number of this isotope would be 8.
An isotope of nitrogen could have more protons neutron electrons?
An isotope of nitrogen will always have 7 protons, as this defines the element. However, it can have a different number of neutrons, thus changing the mass number of the isotope. The number of electrons in an isotope is equal to the number of protons to maintain overall charge neutrality.
What defines an isotope?
Same number of protons, different number of neutrons.
What isotope defines the atomic mass unit?
Carbon-12 isotope is used to define the atomic mass unit, which is equal to 1/12th of the mass of a carbon-12 atom.
An isotope of chlorine has 25 protons and 17 neutrons what is the mass number of that isotope of chlorine?
The mass number of an isotope is the sum of its protons and neutrons. In this case, the isotope of chlorine has 25 protons and 17 neutrons. Therefore, the mass number is 25 + 17 = 42. Thus, the mass number of this isotope of chlorine is 42.
How is an isotope and mass number related?
It isn't, as such. Isotopes of the same element have different numbers of neutrons, and neutrons have a mas of one atomic mass unit (amu). So isotopes have different atomic masses, but being told the number of neutrons any isotope has, will not enable you to say what element or atomic mass it had, unless you remembered the details for every single isotope. Even then different elements can have the same number of neutrons. Isotopes do get named after their atomic mass however - uranaium 235 has an atomic mass of 235, for instance.
What is the mass number of an oxygen isotope that has nine neutrons?
The mass number of an isotope is the sum of its protons and neutrons. For oxygen, which has 8 protons, an isotope with nine neutrons would have a mass number of 8 (protons) + 9 (neutrons) = 17. Therefore, the mass number of this oxygen isotope is 17. This isotope is known as oxygen-17.
What is the mass number of rutherfordium?
The isotope with the longest half life (Rf-267) has the mass number 267.Each isotope has a specific mass number.
What element has a mass number of 144?
Neodymium, Nd, has an isotope with a mass number of 144. Samarium, Sm, also has an isotope with a mass number of 144.
An isotope of radon has 86 protons and 137 neutrons what is the mass number of this isotopes?
An isotope of indium has 77 protons and 115 neutrons. What is the mass number of this isotope
How can you dertermine the number of neutrons in a isotope?
Subtract the atomic number of the isotope from its atomic mass number to obtain the number of neutrons in an isotope.
How does the atomic number relate to the number of protons in an atom?
Atomic Mass (of an isotope) - number of protons (of an isotope) = number of neutrons (of an isotope)
