even
It is an even number.
An even number can be a multiple of an odd number OR an even number. An odd number cannot be a multiple of an even number.
If you add, subtract, or multiply two even numbers, you will get an even number. If you divide an even number by another even number, you may get an even number, an odd number, or even a fraction.
If you add an even number to an even number, you will have an even number as a result.
Any even number minus another even number is either even or zero. Any odd number minus another odd number is also either even or zero.
even
even
A larger nucleus has a higher number of protons, which results in stronger repulsive forces between the positively charged protons. This can lead to instability as the repulsive forces can overcome the attractive nuclear force, causing the nucleus to be less stable and more likely to undergo radioactive decay.
A pairing energy is the extra binding energy associated with pairs of nucleons of the same kind - which results in nuclei which have odd numbers of protons or neutrons having a lower binding energy and being less stable than those with even numbers.
The binding energy per nucleon is a measure of how tightly a nucleus is held together. Nuclei with higher binding energy per nucleon are more stable as they require more energy to break apart. Therefore, nuclei with a higher binding energy per nucleon are more stable and tend to resist undergoing nuclear reactions.
By an even number.
10 protons, 12 neutrons
Atoms with stable nuclei are least likely to be radioactive. Typically, atoms with an even number of protons and neutrons are more stable and less likely to undergo radioactive decay. This includes elements such as carbon-12, oxygen-16, and nitrogen-14.
It depends on how picky you want to be. Yes, having the same number of nucleons they have practically the same atomic mass. No, because they don't have exactly the same atomic mass due to differences in the nuclear binding energy (and hence aren't truly "isobars", even though that's what they're called). (NB: this usage of "isobar" is from nuclear chemistry and means "nuclei with the same number of nucleons." It's not the meteorological isobar, which is something quite different and wouldn't make any sense in the context of the question.)
Stable xenon fluorides have an even number of fluorine atoms because xenon is in the +2 oxidation state when it forms these compounds. This means it can accept a maximum of 8 valence electrons from fluorine atoms to complete its valence shell, leading to the formation of compounds with an even number of fluorine atoms.
Bismuth-209 is stable because it has an odd number of protons and an even number of neutrons, making it less susceptible to radioactive decay. Additionally, bismuth-209 is the heaviest stable isotope of bismuth, which further contributes to its stability.
all of them - even Inert Gases - they just dont react because they have a stable number of them.