Just wondering, why are some atoms radioactive and others not?

In summary, radioactive atoms have an excess of protons or neutrons, causing them to decay and release energy in the form of particles or radiation. Stable atoms have a balanced number of protons and neutrons. Radioactive isotopes can undergo spontaneous fission or decay through various emission processes. It is not accurate to say that all atoms are radioactive because not all atoms have an excess of protons or neutrons. Only certain atoms can release energy through nuclear decay.
  • #1
EIRE2003
108
0
Just wondering, why are some atoms radioactive and others not?
 
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  • #2
The large number nucleoids cannot stay bonded.
 
  • #3
Thanking you
 
  • #4
Many nulcides are stable - they have the 'right' combination (number) of protons and neturons (nucleons) to maintain stability. Some nucides have an excess or protons or neutrons and decay at some point to a more stable configuration.

Radionuclides with an excess of protons will decay (transform) by positron emission or in a few cases by electron capture.

Radionuclides with an excess of neutrons will decay by beta or alpha emssion. Alpha emission occurs in many radionulides having mass greater than 210 amu (Bi-210 and Po-210 are the lightest alpha emitters).

Some transuranic nuclides undergo spontaneous fission.

Please refer to - http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/radact.html#c1
 
  • #5
radioactive atoms are isotopes with a certain number of excess neutrons that they "radiate" those neutrons, and give them off slowly. any atom can become a radioactive isotope by just gaining nuetrons.
 
  • #6
beanybag said:
radioactive atoms are isotopes with a certain number of excess neutrons that they "radiate" those neutrons, and give them off slowly. any atom can become a radioactive isotope by just gaining nuetrons.
Not quite. Only certain atoms release neutrons when they undergo spontaneous fission, or when they undergo neutron-induced fission, or in rare cases interaction with a gamma ray or alpha particle.

Otherwise, nuclear decay occurs by electron emission (beta decay), positron emission, electron capture, alpha particle emission, and gamma decay.
 
  • #7
wait a minute? doesn't radioactive simply mean to release energy. And since all things are always in motion and are made of atoms prove that all things release or provide energy.
 

Related to Just wondering, why are some atoms radioactive and others not?

1. What makes an atom radioactive?

An atom is considered radioactive if its nucleus is unstable and can spontaneously decay, releasing energy in the form of radiation. This instability is due to an imbalance in the number of protons and neutrons in the nucleus.

2. Why do some atoms have more protons and neutrons than others?

The number of protons in an atom's nucleus determines its atomic number and element. The number of neutrons can vary, resulting in different isotopes of the same element. This variation in the number of protons and neutrons can cause an atom to become unstable and radioactive.

3. Can atoms become non-radioactive?

Yes, atoms can become non-radioactive through the process of radioactive decay. This is when an unstable atom releases particles and energy until it reaches a stable state. This process can take seconds, minutes, or even thousands of years depending on the atom.

4. Are all radioactive atoms dangerous?

No, not all radioactive atoms are dangerous. Some naturally occurring radioactive atoms, such as potassium-40, are present in small amounts in our bodies and are not harmful. However, high levels of exposure to certain radioactive elements can be dangerous and increase the risk of cancer.

5. How can we protect ourselves from radioactive atoms?

To protect ourselves from the harmful effects of radioactive atoms, it is important to limit our exposure to them. This can include avoiding areas with high levels of radiation, using protective equipment, and following safety procedures in industries that handle radioactive materials. Regular monitoring and proper disposal of radioactive waste can also help reduce exposure.

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