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What is the largest atomic number for which a stable Bohr orbit can exist?
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What element has the atomic number of 168?
The element with the highest atomic number is Ununoctium (total quantity that has ever existed: three atoms), and its atomic number is 118. Thulium has an atomic weight of 168.9342.
Why don't the elements on the periodic table have a whole number as their atomic weight?
Elements exist as isotopes in nature. So their atomic weight is not a whole number.
What is the atomic number for roentigenium?
Interesting ... At first I thought, this element does not exist. But then I looked it up and to my amazement found out its an artificially generated element with the atomic number 111 :-)
What element in row 6 of the periodic table has the largest atomic radius?
Cesium (Cs), atomic number 55, has the largest atomic radius in period 6.Only francium (row 7) may be larger, but testing is difficult because francium does not exist in any meaningful amounts (maybe 30 g on the entire Earth).
How can the atomic number and mass number be used to determine the amount of each subatomic particle present in an atom of a given element?
The atomic number tells you the number of protons in the nucleus. The atomic mass tells you the average number of protons and neutrons in the nucleus (it has to be an average because most elements exist in a variety of isotopes, and each isotope has a different number of neutrons) so if you subtract the atomic number from the atomic mass you then have the average number of neutrons. And the number of electrons is the same as the number of protons.
How many stable nuclides exist for elements that have and atomic number above 83?
All isotopes of all elements with atomic number similar or greater than 84 are radioactive, and don't have stable nuclei.
Why helium exist in mono atomic state?
Helium has completely filled orbitals, is stable and is not reactive. Hence they exist as mono atomic
Which atom has atomic number zero and mass number zero?
No sense; atomic number zero and atomic weight zero doesn't exist ! Edit: !Answer = 0
Why noble gases exist either in atomic form or in molecular form?
They have completely filled valence electrons, hence are stable, chemically inert. So they exist as mono atomic species and not as molecules
What is a non example of a atomic number?
Only the counting numbers can exist as atomic numbers. Fractions and decimals cannot be an atomic number.
Can atoms be stable when the number of protons are not equal to the number of electrons?
Yes they can be stable. That is the reason why they exist in ionic form. For example fluorine is more stable when it gains an extra electron( Number of protons are 9 Number of electrons are 10). The only elements which are stable in atomic form are Inert gases.
Why odd atomic number elements have 2 isotopes?
I don't know where you got the notion that elements of odd atomic numbers have two isotopes, but we don't have to look far for a counterexample: hydrogen... atomic number 1... has not one, not two, but THREE isotopes that exist for meaningful lengths of time. If you mean STABLE isotopes, then we have to go a bit further: the first four elements of odd atomic number (hydrogen, lithium, boron, nitrogen) do in fact have two stable isotopes. However, at the fifth we find our counterexample: fluorine (atomic number 9) has only one stable isotope, fluorine-19. Furthermore, helium (atomic number 2) ALSO has two stable isotopes, so we can't even invert the original question and ask why EVEN atomic number elements DO NOT have two isotopes. The question is therefore meaningless, as it's asking for an explanation of something that does not, in fact, actually happen.
Why noble gases do not exist as molecules?
They have completely filled valence electrons, hence are stable, chemically inert. So they exist as mono atomic species and not as molecules
What element has the atomic number of 168?
The element with the highest atomic number is Ununoctium (total quantity that has ever existed: three atoms), and its atomic number is 118. Thulium has an atomic weight of 168.9342.
Atomic number for octtriquadium?
This element doesn't exist. Check the spelling.
Why don't the elements on the periodic table have a whole number as their atomic weight?
Elements exist as isotopes in nature. So their atomic weight is not a whole number.
The mass number represents the number of?
The mass number is the sum of the neutrons and protons which exist in the atomic nucleus of an isotope.
