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Emission of a gamma ray does not change the atomic number of the atom. A gamma ray is a photon, and has no mass. The atom's mass is reduced by the conversion of a tiny amount of mass into the energy of the gamma ray. This changes neither the number of protons nor the number of neutrons. It is done by rearranging the nucleons, changing the state of excitation of the nucleus. An example is when 99mTc emits a gamma ray and changes to 99Tc.
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When a radioactive isotope emits a its atomic number increases?
When a radioactive isotope emits a beta particle (high-energy electron), a neutron in the nucleus is converted into a proton. This causes the atomic number of the nucleus to increase by one because a proton has a positive charge and changes a neutron to a proton increases the atomic number.
When radium emits an alpha particle the resulting nucleus has atomic number?
The result is radon, atomic number 86. 226Ra - alpha particle = 222Rn (radon, a radioactive gas)
What atomic number is 84?
Po is a radioactive element.It has the 84 atomic number.
What is the atomic number of tritium?
The atomic number of tritium is 1. It is a radioactive isotope of hydrogen with two neutrons and one proton in its nucleus.
If a radioactive nucleus with an atomic number of 88 emits an alpha particle what will the atomic number of the new nucleus be?
Two less, since the alpha particle takes away two protons.
Why does the atomic radius decrease with an increase in atomic numbers within a period?
As the atomic number increases, the number of protons in the nucleus increases or the effective nuclear charge of the nucleus increases. As a result the force exerted by the nucleus on the valence electrons is more or the size of the atom is small.
What are the two variables that affect atomic size within a group?
Increase in positive charge draws electrons closer to the nucleus. Increase in the number of occupied orbitals shields electrons in the highest occupied energy level from the attraction of proteins in the nucleus.
What is the atomic number of the nucleus?
The atomic number is the number of protons in a nucleus.
How does the atomic number of a nucleus change when beta decay occurs?
The atomic number increases by one unit when a beta decay occurs.
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 is the relationship between the atomic number of an element and its effective nuclear charge, specifically in the case of oxygen?
The atomic number of an element is the number of protons in its nucleus, which determines its effective nuclear charge. In the case of oxygen, which has an atomic number of 8, the effective nuclear charge is the attraction felt by the outermost electrons towards the nucleus, and it increases as the atomic number increases.
The atomic number increases but the atomic mass stays the same?
The atomic number increases but the atomic mass stays the same after the emission of a beta particle by a radioactive atom.
