An isotope is an atom of a given element with a different mass. this means it must have a different number of neutrons, as changing the amount of protons would change the element. in short, an isotope is an atom with a special number of neutrons.
eg.
normal hydrogen-
1
H
1
deuterium (hydrogen with a neutron)
2
H
1
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Natural isotopes of uranium: 234U, 235U, 238U.
Isotopes: atoms of the same element having identical number of protons and electrons but a different nunmber of neutrons.
If an element has one and only one stable isotope, an example is Gold.
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radioactive
For example a thorium isotope is Th-231 or 23190 Th.
Sodium chloride is a compound, not an isotope.
63Cu
If an element has one and only one stable isotope, an example is Gold.
Deuterium is an example of natural, non-radioactive isotope; deuterium is the isotope of hydrogen with 1 proton and 1 neutron.
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radioactive
For example a thorium isotope is Th-231 or 23190 Th.
An example with a zinc isotope: 81Zn (mass number as superscript before the chemical symbol)
Tc99m
The number of neutrons in a nucleus depends on the element referred to and the specific isotope. For example how many neutrons in Carbon-12 would give an answer of 6
The number of neutrons in a nucleus depends on the element referred to and the specific isotope. For example how many neutrons in Carbon-12 would give an answer of 6