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Because such nuclei have stable ratio of protons and neutrons, but some atoms having atomic no less than 82 are also radioactive.

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Transuranic elements are those beyond what atomic number?

Transuranic elements are those beyond atomic number 92 (uranium). These elements are typically man-made through nuclear reactions and have unstable nuclei, leading to the emission of radiation. Examples include neptunium, plutonium, and americium.


What are elements after unranium?

Those with higher atomic number are called transuranic elements


What are the atomic number and mass of the animals?

Animals are not atoms and have neither an atomic number nor an atomic mass.


What are transuranic elements?

The transuranic elements are those with an atomic number greater than 92, the atomic number of uranium. Only neptunium (Atomic number 93) occurs naturally on earth, the rest plutonium americium etc are made artificially. See the wikipedia article http://en.wikipedia.org/wiki/Transuranic_elements


Are actinoids all transuranium elements?

No, actinoids are a group of elements that include both transuranium elements (elements with atomic number greater than 92) and non-transuranium elements. Transuranium elements are specifically those that have atomic numbers higher than uranium (92).


What is the first trans uranium element?

Transuranium elements are those that have an atomic number greater than uranium's, which is 92. The first transuranium element is neptunium (Np) with atomic number 93.


What is atomic number and what relationships does it have to the periodic table?

Atomic number is the number of protons in the nucleus of an atom. All of the atoms of the same element have the same number of protons, and therefore the same atomic number. For example, all hydrogen atoms have one proton in their nuclei, and hydrogen's atomic number is 1; and all carbon atoms have six protons in their nuclei, and carbon's atomic number is 6. Each element's identity is determined by its atomic number. The relationship between the periodic table and atomic number is that the elements are arranged in the periodic table according to increasing atomic number, starting with hydrogen and ending with Ununoctium, which has an atomic number of 118.


What can an element's atomic number tell you about its state of matter?

An element's atomic number tells you the number of protons in the nucleus of its atoms. This, in turn, can help predict its state of matter at room temperature. Elements with low atomic numbers are typically gases, while those with higher atomic numbers are solids or liquids.


What is rubidiums atomic number and what those it mean?

atomic number is 37


Why is the periodic table is so useful?

It helps people find elements on the periodic table.yes that and more it also tells you the atomic number and mass of those elements


This element has the lowest atomic number in group 16?

Nitrogen


How many neutrons are found in an atomic nucleus?

It would depend on which isotope of which element. Different elements and isotopes of those elements do not have the same number of neutrons. Some have none, some have many.