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The Atomic Mass number is the sum of the protons and neutrons of an element. The protons are given by the atomic number, so the neutrons can be found by subtracting the mass number by the atomic number. Both the mass and atomic numbers can be found on the Periodic Table.

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What subatomic particle determines if an element is an isotope or not?

The neutron; the proton determines the element of the atom, but different atoms of the same element can have different atomic masses, due to the different number of neutrons of the atoms. Atoms of same element having same number of protons but different number of neutrons are called Isotopes. Thus, neutron determines the isotope of an atom.


What does it mean for an isotpe to be radioactive?

An isotope is radioactive if it undergoes spontaneous decay, emitting particles or radiation in the process. This decay results in the transformation of the atomic nucleus into a different element or a different isotope of the same element.


What is the element that has sixteen protons and neutrons?

Phosphorus and sulfur both have 16 neutrons.


An element with the same number of protons and electrons as another atom of the element but with a different number of neutrons?

For the most part, yes the quantities of each are different. Light nucleii can have the same number of protons and neutrons and be stable enough to stay the same element (deuterium = 2H, 4He, 6Li , 10B, 12C, 14N, 16O, 20Ne, 24Mg, 28Si, 32S, 36Ar, 40Ca are stable), but a nucleus of a given element can sometimes have more or less neutrons, and be stable. Tin is the heaviest nucleus that has an isotope where #p = #n, and this isotope is very unstable


How many neutrons does nobelium have?

157; you figure that out by taking the atomic mass (259) and subtract it by the # of protons (102) and the answer is the # of neutrons. ( the atomic #, # of protons, and # of electrons are always the same # 102 ). But each isotope of nobelium has a different number of neutrons, depending on the atomic mass.

Related Questions

What element has 82 protons and 124 neutrons?

the element is lead and the particular isotope is Pb-206


What is the element the only stable isotope of a particular alkali metal that has 78 neutrons?

Ba and Cs


What configuration defines an isotope of the same element?

Isotopes of one particular element differ only in their number of neutrons in nucleus.


One isotope for a particular element is distinguished from another by the number of?

protons and neutrons in its nucleus. The number of protons determines the element, while the number of neutrons can vary to create different isotopes of that element.


What element has 8 protons 8 electrons and 11 neutrons?

The element with 8 protons and 8 electrons is oxygen (O). The presence of 11 neutrons indicates a specific isotope of oxygen, oxygen-19.


What transition element has 50 neutrons?

Isotope 89Y and isotope 90Zr has 50 neutrons.


What is make an atom isotope?

It is the neutron that makes changes in atomic nuclei to change them from one isotope to another. For any given element, that element will have a fixed number of protons. It is, after all, the number of protons that determine the elemental identity. But the number of neutrons in a given element can vary, and we use the term isotope to talk about which particular atom we're investigating. That is, we apply the term isotope to speak to an atom of a given element with a certain number of neutrons in its nucleus.


What is an atom called when the number of neutron changes?

An atom with a different number of neutrons is called an isotope of the original element. Isotopes have the same number of protons (and thus the same element) but different numbers of neutrons.


What is a antonym for isotope?

The antonym for isotope is non-isotope. An isotope refers to atoms of the same element with different numbers of neutrons, whereas non-isotope would refer to atoms of the same element having the same number of neutrons.


What is the symbol for a sodium isotope with 12 neutrons?

The symbol for a sodium isotope with 12 neutrons would be "Na-23". This notation indicates the element symbol "Na" for sodium and the total number of protons and neutrons in the nucleus (12 neutrons + 11 protons = atomic mass number 23).


What subatomic particle determines if an element is an isotope or not?

The neutron; the proton determines the element of the atom, but different atoms of the same element can have different atomic masses, due to the different number of neutrons of the atoms. Atoms of same element having same number of protons but different number of neutrons are called Isotopes. Thus, neutron determines the isotope of an atom.


An element with a number of neutrons different from its normal number is called a what?

It is called an isotope.