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What is U-235 and U-238?

What is U-235 and U-238?

U-235 is the main fissile isotope of uranium. The nucleus of the U-235 atom contains 92 protons and 143 neutrons, giving an atomic mass of 235 units. The U-238 nucleus also has 92 protons but has 146 neutrons – three more than U-235 – and therefore has a mass of 238 units.

What is uranium-238 an example of?

Natural uranium consists of three isotopes: uranium-238, uranium-235, and uranium-234. Uranium isotopes are radioactive. The nuclei of radioactive elements are unstable, meaning they are transformed into other elements, typically by emitting particles (and sometimes by absorbing particles).

Why are U-235 and U-238 considered isotopes?

The difference between the three isotopes is the number of neutrons present in the nucleus. U-238 has 4 more neutrons than U-234 and three more neutrons than U-235. U-238 is more stable thus being more abundant naturally. U-235 is used as fuel in nuclear reactors and/or weapons.

What type of element is U-238?

Uranium-238
Uranium-238 (238U or U-238) is the most common isotope of uranium found in nature, with a relative abundance of 99%. Unlike uranium-235, it is non-fissile, which means it cannot sustain a chain reaction in a thermal-neutron reactor.

What do medical terms start with the letter U?

Medical terms are used in the field of medicine, and clinical settings. This section deals with med terms beginning with the letter “U”, and features a list of medical suffixes, prefixes and roots. This section was developed for ‘speed learning’ of medical terminology.

When do you use suffixes in medical terms?

Suffix: The ending part of a word that modifies the meaning of the word. Medical terminology is used to precisely describe the human body components, processes, illnesses, medical procedures, and pharmacology. Medical terms are used in the field of medicine, and clinical settings.

How are medical terms used in the field of Medicine?

Medical terminology is used to precisely describe the human body components, processes, illnesses, medical procedures, and pharmacology. Medical terms are used in the field of medicine, and clinical settings. This section deals with med terms beginning with the letter “U”, and features a list of medical suffixes, prefixes and roots.