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It has to do with the line of stability. Isotopes are made of an extra neutron, making the Atomic Mass greater. If the number of protons and neutrons on the graph that has the line of stability fall anywhere that's not on the line, it is unstable.
What else can I help you with?
What are the atomic numbers and mass numbers of the stable and radioactive forms?
1. The atomic number is equivalent to the number of protons in the atomic nucleus of a chemical element. The number of protons is identical for all the isotopes of an element. 2. The mass number is the sum of protons and neutrons in the atomic nucleus of an isotope.
What do you know about an isotope?
Isotopes have same atomic number. They have different mass numbers. Their physical properties are different.
Why those elements does not emit radiation whose atomic number is less than 82?
Elements with atomic numbers less than 82 do not emit radiation because they do not have unstable nuclei. Radioactive decay occurs when an atom has an unstable nucleus, which may be due to an imbalance of protons and neutrons. Elements with atomic numbers greater than 82 are more likely to have unstable isotopes that can undergo radioactive decay.
What are the radioactive elements with atomic number from 90 to 103 in the periodic table called?
The elements with atomic numbers from 90 to 103 are called actinides. These elements are known for being radioactive and having partially filled 5f orbital. They include well-known elements like uranium, plutonium, and americium.
Why are most atoms in period 7 synthetic and radioactive?
Atoms in period 7 of the periodic table are synthetic and radioactive because they have large atomic numbers, making them unstable. These atoms are typically created in particle accelerators by smashing together smaller atoms to reach the high atomic numbers found in period 7. Due to their instability, these synthetic atoms decay rapidly through radioactive processes.
Why are the elements 94 through 110 in the periodic table whole numbers?
1. All the atomic numbers are whole numbers. 2. If you think to atomic weight of heavy radioactive elements (atomic numbers from 93 to 118) is a rule of IUPAC to indicate in square parenthesis, [], the atomic mass of the most stable or known isotope.
When radium atomic number 88 emits an alpha particle the resulting nucleus has atomic numbers?
226Ra------------alpha particle----------222Rn (radon, a radioactive gas)
How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
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.
What are the atomic numbers and mass numbers of the stable and radioactive forms?
1. The atomic number is equivalent to the number of protons in the atomic nucleus of a chemical element. The number of protons is identical for all the isotopes of an element. 2. The mass number is the sum of protons and neutrons in the atomic nucleus of an isotope.
What do you know about an isotope?
Isotopes have same atomic number. They have different mass numbers. Their physical properties are different.
Any element with an atomic number greater than 92 is?
An element with an atomic number greater than 92 is considered a transuranium element. These elements are artificially created in a laboratory and are generally unstable, undergoing radioactive decay. Examples include neptunium, plutonium, and americium.
What does it mean if an element is radioacitive?
If an element is radioactive, it refers to the stability of their atomic nucleus. If that atomic nucleus is not stable, it is considered radioactive.
Why those elements does not emit radiation whose atomic number is less than 82?
Elements with atomic numbers less than 82 do not emit radiation because they do not have unstable nuclei. Radioactive decay occurs when an atom has an unstable nucleus, which may be due to an imbalance of protons and neutrons. Elements with atomic numbers greater than 82 are more likely to have unstable isotopes that can undergo radioactive decay.
What is the charge to mass or atomic no to atomic mass ratio for a element to call it aradio active element?
An An element is considered radioactive if it is so large and unstable that it releases electromagnetic waves and/or neutrons and deteriorates into elements with smaller atomic numbers.
What are the radioactive elements with atomic number from 90 to 103 in the periodic table called?
The elements with atomic numbers from 90 to 103 are called actinides. These elements are known for being radioactive and having partially filled 5f orbital. They include well-known elements like uranium, plutonium, and americium.
Which atoms will always be radioactive?
There is no specific atom that will always be radioactive. Any atom with an unstable nucleus can be radioactive, resulting in the emission of radiation. Isotopes of certain elements, such as uranium and plutonium, are more likely to be radioactive due to their relatively large atomic numbers.
