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What is the highest number of protons that a nucleus can have and still be considered stable?
Wiki User
∙ 14y ago
There are 83 protons in the nucleus of bismuth-209 (Bi-209), and for the longest time, it was thought to be the heaviest element with at least one stable isotope. But it turns out that is it actually an alpha emitter with a half-life of about 19 x 10-18 years. As that is an extraordinarily long time, no wonder it wasn't discovered. But given such a long half-life, a lot of folks still consider it to be stable. But since it has been revealed that bismuth is unstable (though on a timescale longer than geologic), that leaves lead, with its 82 protons, as the heaviest element with a stable isotope.
Wiki User
∙ 14y ago
Wiki User
∙ 10y agoThe largest atomic nucleus is for cesium-133 (aka caesium-133).
The heaviest stable element is lead-207 (207Pb).
Previously it was believed that bismuth-209 was stable, when in fact it is just meta-stable with a half life of 2 billion-billion years.
Wiki User
∙ 13y agoWe don't know yet as we're still creating newer, heavier elements all the time. Currently, the most protons that we've seen in a nucleus is 118, although the element produced is highly unstable. The maximum amount of protons that can be in a stable nucleus used to be thought to be 83, corresponding to bismuth, but it's since been found to decay. Therefore, the honor now goes to lead, element 82.
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Define the term mass number?
Mass number is a value approximate to the number of protons (Atomic Number) plus the number of neutrons within an atom of the element considered. I say approximate as mass number takes into account the mass of the nucleus and not the actual number of protons and neutrons in the nucleus.
What kind of atom has 79 protons in its nucleus?
An atom's atomic number gives its number of protons in its nucleus. Checking the periodic table, we see that gold's atomic number is 79. Thus, gold is the element with 79 protons.
How do i determine the daughter nucleus formed when a radon-222 nucleus emits a alpha particle?
First, you figure out how many protons and neutrons Radon-222 has. Find the atomic number - that's the number of protons. Subtract that from 222 to get the number of neutrons.From that, you subtract an alpha particle - i.e., 2 protons and 2 neutrons. Use the number of protons to look up the element. Add protons and neutrons to get the isotope number. As an alternative, since you don't really need the number of neutrons, you can just subtract 2 protons, and a total of 4 nucleids from the parent nucleus.
How do helium argon and neon differ?
They differ in the number of protons in their nucleus.
Which subatomic particles has a negative charge and is located outside the nucleus?
The nucleus of an atom is made of neutrons and protons. Electrons move around the outside of the nucleus. The number of electrons around an atoms nucleus compared to the number of protons in the nucleus determines the charge of an atom, and the charge of an atom effects the way that an atom reacts with other atoms.
How do you know which element have the greatest number of protons in their nucleus?
The elements with the highest atomic numbers have the greatest numbers of protons in their nucleus, because that is the definition of atomic number.
Which element an atom is considered to be is determined by what number?
The number of protons in the nucleus of the atom.
The number of protons in an atom's nucleus is the?
The number of protons in an atom's nucleus is the Atomic number.
What does the atomis number tell you?
Is the number of protons in an atom determines its atomic number
What is the particle that identifies a atom?
The number of protons in an atom's nucleus determines its chemical identity.
Number of electrons and protons in a nucleus?
The number of protons in a nucleus depends on which element it is. ( The number of protons is the decider as to which element it is. ) The number of electrons in an atom is the same as the number of protons in the nucleus, but none of the electrons are in the nucleus. Rather, they orbit around the nucleus like planets round a star.
How did you find out protons are in the nucleus?
The number of protons in the atomic nucleus is equal to atomic number.
Protons in the nucleus?
The number of protons in the atomic nucleus is equal to the atomic number of an element.
What is the correspondent to the number of protons inside the atomic nucleus?
The number of protons in the nucleus is the same as the atomic number.
What is the atomic number of an elements based on?
The number of protons in the nucleus of an atom.
How do you find the number of protons in an elements nucleus?
The number of protons in an elements nucleus is the same number at the atomic number.
Can the nucleus hold two or more protons?
A nucleus contain protons and neutrons. A nucleus can hold more protons - the number is equal to atomic number.
